Four strangers - Viktor, Maura, Seth, and Lilith - wake up in an unknown location and are told by a mysterious voice that they must kill each other in order to survive and be set free. Viktor is found dead with a knife wound. Maura is then seen covered in blood holding the knife and shotgun. She threatens Lilith but breaks down, claiming she is not the killer. Seth and Lilith find Maura has also been killed. It is then revealed that Lilith was the killer who murdered all of the others in her attempt to survive and be set free.