Katheline Robinson wakes up somewhere she's never been before. She has memories, but not many. She is accompanied by one person, who's name is Daisy Linson. The two are in a hotel-like place, with a glass door. Out the glass door the two girls can see a grey hallway and other glass doors. Every few days a room in their apartment changes into a different challenge the two must complete if they would like to survive or get more memories back. They know there are others out there... and they also know that this isn't for their benefit... at all.