After killing a group of campers, Andrew Graves (22 years old) and his younger sister Ashley Graves (20 years old) got summoned to the Demon's world because Ashley made a deal with the demon so that he would save them from the police. So now, Andrew and Ashley are in the Demon's castle, in the empty "guest" room, until the demon asks Ashley to collect souls for him by going to the Human world. Ashley accepts, despite Andrew's protests, and starts going to the Human world to summon the demon so she can give him souls and then the demon summons her back into his world thanks to the talisman he had given her to let her have premonitory dreams. While Ashley is doing that, Andrew just waits in their room, until he decides to explore and accidentally enters a locked room that the demon normally forbids access too.