A strange disease is plaguing the city; classes are cancelled, businesses are closed, all is under a state of emergency. What at first seems like a normal flu quickly leads to blind rage and cannibalistic behavior. Narrowly escaping contamination, Eva and Sam, a young married couple, are forced to barricade themselves in their high-rise apartment despite the palpable tension between them. Now forced into isolation in their small living space, they struggle with their own frailty in a world that can only offer the worst horrors imaginable.