Josh finds himself alone in a post-apocalyptic world overrun by infected strangers. He takes shelter in an abandoned hospital but is attacked by an infected stranger. After escaping, Josh wanders aimlessly until finding an abandoned pub to sleep in. Upon waking, he is confronted by four armed survivors who initially threaten him but then offer to take him back to their base, where their doctor can treat his wound, after Josh proves his fighting ability. Josh agrees to go with them but remains wary after his previous negative experiences with other survivors.