In the Titanic battle between Good and Evil, will a seemingly unconquerable Shubh fulfil his destiny and cause a complete collapse of society, or will the forces of good, against all odds, manage to prevail?

ATF has to stop Shubh's next attack. While DJ goes behind Shubh's roots, the ATF team manages to get clues from Nusrat's kidnapper. They all eventually realize what Shubh's plan & attack is & how he carefully orchestrated it.

The CBI members are at their lowest ebb and as they take in the ramifications, there is a hostage situation at a restaurant. While the team races against time to stop Shubh, in a stunning surprise DJ has one last trick up his sleeve.

The sudden death of a priest right in front of his teenage son sends people in a frenzy. 11 years later, Nikhil Nair, a forensic expert teaching at the FBI HQ, receives coordinates of an unknown location from a mysterious source only to find out a completely mutilated, tortured and charred body back in India. With a killer responsible for a murder that can make even the toughest cops shudder on the loose, Dr. Dhananjay Rajpoot, a forensic expert is set on a wild goose chase.

The investigation takes a wild turn as Dhananjay finds out the mutilated and charred body found earlier was in fact of his wife - Sandhya. But even before he could come to terms with the inconceivable loss, Dhananjay is arrested for murdering his wife. With the clock ticking, and the pressure mounting, another body with the same mask is recovered from Nagaland.

With a merciless killer on the loose and Nikhil in his custody, the desperate CBI now turns to DJ for help. Leaving nothing to chance, DJ gets on with the investigation. Meanwhile, Nikhil is given his new murder mission. On target, Aaditya Jalan, a billionaire philanthropist.

CBI team investigates how Shubh killed those 3 people. DJ will work outside the system to catch Shubh and will go into his past, to Varanasi. Nikhil is determined to uncover the clues leading to Shubh & finds another set of coordinates.

Worried for his family, Nikhil gives in to the killer's demand and plans to murder Aditya Jalan. But this time it's his mentor DJ who is pulling all stops to catch the killer before it too late. It's mentor vs protégé! Who will win the deadly game?

The killer has always been a step ahead of Nikhil and Dhananjay. It's more evident than ever as Nikhil is now trapped in killer's custody and Dhananjay is behind bars. But what does the ruthless killer want? A perfect murder carried out by Nikhil himself! Meanwhile, Dhananjay finally figures out how it's all connected.

The CBI team is trying to rescue Nusrat against all odds. Nikhil gets a clue, but before they can discover Shubh's plans, Rasul threatens them for Nusrat's life. They don't know yet that Rasul is leading them into a devious trap.