With the engines turned off, chaos reigns on the ferry. Edith prepares her spectacular plan to stop the spread of the infection. Meanwhile, Calle begins an evacuation of survivors who have not yet been infected. Albin sets off to find his mother. Which passengers will be able to reunite with their loved ones? Pia meets Dan in a final showdown.

Those who are not yet infected realize that they must leave the ship to survive. Pia gains a new ally, but they disagree on how to stop the infection. A group of survivors, led by Kalle, try to get to the engine room to turn off the engines and hoist the lifeboats down. Dan seeks out Nadja and declares his love for her. Edith realizes that only extreme measures can stop the infection, even if it means sacrificing innocent people.

Contact with land is broken. Pia watches in horror on the surveillance screens what is happening on the ferry. Meanwhile, unknowing passengers are partying hard at the nightclub. Pia makes a drastic decision. Lo and Albin have evidence of what is happening on the ferry, but no one listens to them. Marianne and Göran try to escape to a cabin. Dan decides to attend a snap staff meeting.

The vampire infection spreads when Walter turns Dan into a thinking vampire, who quickly becomes fascinated by his new abilities. Albin and Lo pursue Edith after seeing her attack another passenger. Pia realizes that something truly terrifying is happening right before their eyes and is forced to act in a way she didn't think she was capable of. Marianne, Göran and Vincent barricade themselves inside a club as panic spreads on the ship.

Walter and his new friend begin to explore the ferry while Edith desperately searches for him to try to prevent his advance among the passengers. Tensions rise between both Marianne and Göran and Calle and Vincent. Cousins Albin and Lo begin to suspect that something is very wrong on the ferry. Dan is attacked on the karaoke stage while the conflict between him and the guard Pia escalates. Walter makes a new best friend.

On an ordinary Finnish ferry, two vampires roll aboard in a worn-out camper van. During the night at sea, contact with land is suddenly lost. The journey turns into a terrifying journey where your best friend can become an enemy, and where enemies are forced to cooperate to survive.