Yusuke and his entourage have made it to Sensui's lair, but their battle to save the human race is just beginning. The opening to the Demon World is widening rapidly and shows no signs of slowing down. What's more, an old nemesis reveals his own master plan. His target, Kurama!

Team Urameshi prepares to depart Hanging Neck Island the victor of the sinister Dark Tournament to return to the world of the living leaving their fallen mentor and friend behind. But somewhere far away a chance encounter between two former allies seems to hint at what is to come as the most unlikely of people reveals a most shocking secret.

After being saved in the nick of time by Puu, Yusuke revels in his new power and resumes his battle with Sensui. Although Yusuke's skill and strength have increased, he is still clumsy with his new abilities. But there is no time to practice as Sensui bears down for the final confrontation.

Fifty years ago, Genkai and Toguro were actually teammates who fought and won their own Dark Tournament, before becoming violently estranged. Yusuke Urameshi arrived just in time to see his teacher slain, and assaulted Toguro in a rage, only to be knocked away by one devastating blow. With the final round of the tournament soon to begin against Toguro, Yusuke must find a way to keep that from happening again.

The ultimate showdown between Yusuke and Toguro finally begins, and everyone is on the edge of their seats -- at least everyone that hasn't been melted into their seats by Toguro's intense Spirit Energy. Yusuke reveals the power he inherited from Genkai with a colossal blast of his Spirit Gun, but is it enough to bring down Toguro once and for all?

With no thought to their own safety, Kuwabara, Kurama, and Hiei charge deep into the tunnel in an effort to rid all worlds of Sensui forever. Meanwhile, King Yama's soldiers arrive to take Yusuke's body away to ensure he is never revived. As Koenma does his best to stop them, help arrives on the horizon in a very different form.

During his match with Toguro, Kuwabara is told of Genkai's death. With extreme rage Kuwabara strikes Toguro with the Trial Sword splitting the demon in half! The arena watches in horror as the evil Toguro rises from the arena floor unharmed.

As Yusuke lies beaten on the arena floor, Toguro taunts the Spirit Detective. Toguro begins to suck the souls of the spectators in order to enrage Yusuke to once again bring out his full power. But Toguro soon learns that the best way to provoke Yusuke is to kill one of his friends!

Yusuke reveals to Toguro that he has not been fighting at full power and removes the Spirit Cuffs, which reduce his power. Finally, a fully powered Yusuke launches an attack at his nemesis. But Toguro too has powered up to his top level and stares down Yusuke's most powerful Spirit Blast.

The Dark Tournament finals have just begun and Kurama finds himself facing the strangely magnetic yet dangerous Karasu. Kurama, believing that it's his only chance to defeat his eerie opponent, transforms himself into the powerful and equally ruthless Yoko Kurama. Things seem to be looking up, but will Kurama's metamorphosis be enough to conquer Karasu?

Yusuke comes to terms with the fact that he cannot defeat Sensui. Watching but unable to help, Kuwabara fights off emotion with rage as he remembers all the good times and bad he's had with his best friend. Kuwabara manages to free Kurama and Hiei, but it's too late. Yusuke Urameshi has been destroyed.

With the Dark Tournament at an end, Yusuke must beign to cope with the loss of his best friend at the hands of Toguro. After Sakyo asks Koenma to take his life, the evil billionaire unveils his final evil plan to destroy the entire stadium with everyone still inside!

Too late to save their friend's life, Kuwabara, Kurama, and Hiei unleash their most devastating attacks on Sensui, who retreats within the tunnel. King Yama reveals a dark secret to Botan. What news would cause her to tremble in terror? What does King Yama know about Yusuke that the others do not?

Hiei takes on Rokuyukai’s leader, Zeru, whose explosive fire attacks ravage the stadium. Hiei must resort to an unbelievable technique, one that could take his life as well: he must summon the power of a dragon.

Yusuke struggles to continue his fight with Yomi and as his demon blood continues to flow through him, his demon engery also flows out.

In the next match of the tournament, Hiei steps into the ring of battle against his former ally, Mukuro. But Mukuro has already explored the horrors of Hiei's past and knows his thirst for revenge. Will this give the bizarre, shackled fighter the advantage? As a last result Hiei prepares his ultimate weapon: the Dragon of the Darkness Flame!

The doctor’s human experiments are clearly fighting against their will! As Yusuke prepares to put them out of their misery, the Masked Fighter intervenes and suggests a peculiar plan.

A disappointing verdict is handed down in the Kurama versus Karasu match, reversing Team urameshi's fortunes in the Finals of the Dark Tournament. Hiei seeks to recover from this setback in the ring with Bui, but will the power lurking beneath Bui's armor be too much for him?

Koenma's tactics have saved Yusuke for now. But mysteriously Yusuke won't allow the Prince of Spirit World to use his pacifier. While they discuss their next move, the terrible gateway between Demon World and Living World opens.

High school student Kazuma Kuwabara is having a typical day. He is studying hard for his college entrance exams and fending off the flirtatious glances from his female admirers. But nothing could prepare him for what happens when he arrives at a mysterious meeting with Genkai. Surprise follows surprise as one by one each member of the old gang shows up! But where is Yusuke?

As the three strangers in Kuroko's house explain the reason for their presence, Yusuke begins to sense that something is amiss. These demons have come to him to reveal one thing: that Yusuke's ancestor resides as a king of Demon World! And unless Yusuke travels to Demon World soon, the balance of power could shift and spell the end of humans reign at the top of the food chain.

Yusuke's body has undergone an intense transformation as his dormant demon blood takes hold. As the battle against Sensui concludes, Koenma tells Yusuke that he must choose between Demon World and Living World. Without hesitation, Yusuke makes his decision!

In the last match against Team Uraotogi, Genkai overwhelmed Suzuka, an old demon with many tricks and specialties, but little strength. Meanwhile, Yusuke recovers from the torturous absorption of Genkai's Spirit Wave Orb, which promises to give him unfathomable power. Yusuke's team has claimed their spot in the Dark Tournament's final round. Now Team Toguro must try to do the same.

Yusuke and Chu, both drained of their Spirit Energy, struggle to win the first round of the Dark Tournament for their team. They agree to settle it with a Knife Edge Death-Match, an intense and fatal arena of combat.

Yukina is a beautiful ice apparition whose tears transform into priceless jewels. Now a filthy human crime lord named Tarukane has kidnapped Yukina, planning to extract her tears through torture and make a fortune! Yusuke, Kuwabara, and Botan must quickly mount a rescue mission. But why is Hiei not allowed to know?

Yusuke and team return topside to the waiting arms of their friends. But all is not well. King Yama's soldiers arrive saying that they must destroy Yusuke once and for all. Could this be the end? How much energy does the Spirit Detective have after his exhausting battle with Sensui?

In his first match of the tournament, Yusuke faces an impossible disadvantage. He can't see a thing in the pitch-black arena, but a hi-tech helmet allows Kibano to follow Yusuke's every move. Even if the battle-worn detective can survive Kibano, he'll have to fight his second match immediately -— against a lethal ninja!

Suzaku uses The Prism of Seven technique to create seven Suzakus. Not merely copies, each one has independent will and full powers - all aimed at the torture and annihilation of Yusuke.

Yusuke, Kurama, Hiei, and Mitarai enter a cavern controlled by the tricky Gamemaster. Gamemaster's territory can be manipulated into a video game, a game where everyone must play by the rules in order to survive. Yusuke's team must win 4 rounds to move on, but is a victory possible against an adversary who can manipulate the rules?

Yusuke's Spirit Detective team continues toward Tarukane's mountain stronghold, facing a small army of grotesque demon guards. It seems an alliance has formed between human criminals and demon mercenaries, with money as the bottom line. Yet Kuwabara plows fearlessly ahead declaring he's in love with Yukina!

In a brutal power play, Yomi has forced Kurama to serve as his advisor. If he doesn't, Yomi will destroy the one person Kurama loves more than anyone. But the alliance is hardly stable, for ancient seeds of hatred lie between them. Meanwhile, a group of familiar faces from the past return for one more shot against Yusuke!

Searching Mushiyori City, Yusuke's team was quickly steered to the hospital, where a trap awaited. There they encounter the Doctor, a human with immense psychic powers, super strength, feels no pain, and has infected the entire hospital with a deadly virus. To save his friends, will Yusuke be forced to destroy the wretched creature?

As Yusuke continues his chase of Sensui, the unbelievable Sniper confronts Yusuke. As Genkai and the rest of the team follow, can Yusuke escape Sniper's endless barrage, reach Sensui and save Kuwabara... not to mention, the entire human race?

Yusuke returns from training with the great psychic Genkai, and not a moment too soon! Dreadful Makai Insects are invading his own city, part of a sinister scheme to flood the earth with demons! With Kuwabara at his side, Yusuke dives into a forbidden demon city. His target: four deadly creatures known as the Saint Beasts!

Two of the four Saint Beasts are dead -- or so Yusuke and his team believe! But in the chamber of Seiryu, a Beast who can trap his enemies in ice, an unexpected guest arrives. How can two Beasts in one room be stopped? And why is Hiei, a cold-hearted rogue, suddenly beset with emotion?

Pulled by the sprightly, pink-robed Botan, Yusuke enters a realm that is not quite normal -- the Spirit World. There, Yusuke meets Koenma, a 700 year-old ruler with the body of a toddler, pacifier and all! But there's no rom for laughs as Koenma gives Yusuke an ordeal to restore his life. Hatching a Spirit Beast!

Yusuke receives his first real case as Spirit Detective. Three demon thieves have muscled their way into King Yama's sacred vault, stealing the three Artifacts of Darkness. Yusuke must recover the artifacts and bring the thieves to justice before they unleash dark and deadly powers on the people of Earth.

Kurama faces down Shigure in the ring! But Kurama has to deal with the demons of his past: namely his choice to remain in the Human World. With the boiling up of tempers and anxieties comes the resurgence of Yoko Kurama! But will Kurama find a way to keep his anger from taking over?

Kurama's anger has sentenced Toguro to an eternity of suffering, forever chasing his foiled revenge. But the tunnel to Demon World is opening. Can Yusuke's team still save the human race? Only a dramatic showdown between the past and present Spirit Detectives will reveal the truth!

With two artifacts under his belt, Yusuke heads for his most dangerous challenge yet – the ruthless demon Hiei. But unbeknownst to Yusuke, Hiei is chasing him, and kidnaps his girlfriend Kayko! Unless Yusuke can retrieve the antidote inside Hiei's Shadow Sword, Keiko will become a brainless, monster slave! Can Yusuke close the case?

Kurama and Hiei, two demons Yusuke beat in his first case, join Yusuke and Kuwabara to battle the Saint Beasts. This awkward alliance must learn to trust each other quickly, as they struggle through the Gate of Betrayal. And waiting just beyond this trap is the first Beast —- a giant made of solid stone!

Yusuke, Kuwabara, Kurama and Hiei rush into the next part of the castle as they reach the final chamber where Suzaku awaits. Unknown to them Suzaku's master plan is being made - to capture Keiko.

The oafish demon Gouki is using the stolen Orb of Baast to capture children's souls. If Yusuke doesn't track down and defeat this monster quickly, those souls will become the monster's next meal. But Gouki isn't the only one Yusuke has to worry about when the second thief suddenly appears. His name is Kurama, and to great surprise, he asks Yusuke for a favor...

One of Yusuke's teammates has been badly injured, and Kuwabara insists on fighting the next enemy all by himself -— revealing his amazingly improved Spirit Sword! Before the bickering group can disagree, a ferocious roar slices through the castle. Byakko, the second Saint Beast, is waiting!

Despite his stunning victory at the Dark Tournament, Yusuke Urameshi learns firsthand that there are others wishing to challenge him. Yusuke makes the first mistake by underestimating the strengths of these new adversaries. With his best friend kidnapped, Kuwabara must round up the old gang in order to stage a rescue attempt...or suffer the consequences!

During a three-on-three battle, a rip on the Masked Fighter’s headdress gives a surprising peek into the warrior’s true identity! But there’s little time to ponder the ramifications, as Kuwabara now refuses to fight!

As Itsuki explains more about the bizarre Sensui, Koenma prepares to use his most powerful weapon: his pacifier! It can create a barrier that would stop the demons from flooding Living World. Koenma knows that Sensui must be stopped or his evil plan will come to fruition dooming the entire human race!

The Spirit World forgot an important question -- does anyone want Yusuke back? Koenma sends an Investigator to find out, and Yusuke's friends answer quickly when a fire threatens to char his earthly body. But will Yusuke give up the Spirit Beast, his one chance for revival, to rescue his friends?

A tunnel is being carved between the Living World and the Demon World that if completed would usher in such darkness and chaos that the world might never recover. In a bold move, the despicable Sensui begins his search for the person that will finally allow him to complete the tunnel.

The members of Team Toguro demonstrate their power in the semifinals by utterly defeating another team with minimal effort.

After a harrowing fight on a collapsing bridge, Byakko is seemingly defeated. But as soon as the Spirit Detective team enters the castle's next wing, a fearsome tiger roar bids Kuwabara to round two -- in Byakko's secret lair. Can this Beast be beaten once and for all, in a room of molten lava?

Having rescued Yukina and defeated Toguro, Yusuke is spending some time with Keiko in the city. However, when a huge chunk of building is blown up, Yusuke sees Toguro, and they have a little chat. Turns out that Yusuke and Kuwabara really didn't defeat the Toguro brothers, as they were faking and working for Sakyo, and now Toguro wants Yusuke to enter a competition called the ""Dark Tournament"". Compiled of a group of greedy mafia warlords, Toguro convinces Yusuke, as Yusuke gathers Kurama, Hiei, and Kuwabara for his team, the gang sets out to compete in the tournament.

As the tournament to decide the king of Demon World wraps up it's preliminary round, one match continues to wage on. A father and son were pitted against each other in the random drawing. Now the vigor of youth has to beat out the patience of age. Which one will come out on top? Who will finally advance to the main tournament?