Ten people gather together at a complex named "Ankikan" after hearing of a short term job paying 112,000 Yen ($1,236 USD) per hour. The ten people are informed that they will be monitored 24 hours a day for 7 days straight in a psychological experiment. They are then sent to individual rooms with a different weapon located in each room. Once they are locked in they learn the rules of the psychological experiment. 1.) Each person must return to their room by 10 PM. 2.) At the end of 7 days or when there are only two surviving members left alive the experiment will end. The next day a person is found shot to death. Now, what looked like a dream job will turn into a nightmare.