An overnight pleasure cruise aboard the party boat "Baltic Charisma" descends into mayhem when Edith, a protective mother on a desperate mission, and Walter, her volatile son with a thirst for blood, are unleashed on the unsuspecting passengers. When Walter's desire for freedom and adventure unleashes chaos, the fates of washed-up pop star Dan, conflicted security guard Pia and everyone on board become intertwined in a desperate fight for survival.