After visiting his ex-girlfriend’s Berlin apartment in hopes of repairing their relationship, Michael finds himself trapped in the building when a mysterious rage virus suddenly spreads through the city, turning agitated people into violent cannibals. As chaos erupts outside, Michael teams up with a young repairman and other residents to barricade the building, learn more about the strange behaviour of the infected, and search for ways to survive. Tensions rise as they experiment with methods to stay safe, gather supplies, and attempt a dangerous escape from the apartment complex while the outbreak rapidly overwhelms the city.