A bombshell reunion separates Jamie from his friends and puts him in grave danger, while the rest of the gang get to grips with the eccentric festival. Soon, everyone finds themselves drawn into an unwanted encounter with an old foe.

As the past comes back to haunt him, Jamie goes rogue and makes a terrifying, inhuman discovery. Meanwhile, an old adversary makes their presence known.

As devastating news reaches Jamie and Vivian, their morals are put to the test as they face what it will take to win the battle against Velorum.

As the full horror of the festival becomes clear, there may be no going back for Jamie when he is faced with a final, nightmarish choice.

Welcome aboard The Sacramentum. New recruit Jamie Walsh gets a crash course on ship life while trying to keep a low profile as he investigates what happened to his missing sister.

After an unlikely ally reveals new information on Pippa's last days on board, Jamie and Vivian make a shocking discovery that leads to a dangerous confrontation.

Jamie becomes embroiled with an illicit operation on board in exchange for new information on his sister. Meanwhile, Vivian is charmed by a guest as another crew member vanishes.

After the group decide to go their separate ways, Jamie and Vivian must delve deeper to find the missing festival staff, forging new alliances along the way. Meanwhile, the gang on the road become lost and find themselves caught up in a terrifying siege.