A young man called Dan wakes up on a beach with amnesia. He wanders through a derelict town and stumbles upon a couple. Out of the blue, the man called Ben is murdered by a crazy man and Dan and the woman called Lisa flee. She brings him to a house with survivors and he befriends the group: the leader Sam, Kate, James, Stephen, Will, Adi and Satch. Meanwhile the army is taking over the town. Soon Adi is infected and their friends are forced to kill her. When a group goes to a supermarket to scavenge supplies, they stumble upon the army and Dan and Lisa escape together. But a sniper kills Lisa and Dan subdues and kills the soldier. He finds a wanted note with his photo in the pocket of the soldier. Why is the army hunting Dan down?