The young unemployed Yuki Rikyuhiko (Fujiwara Tatsuya) has been racking his brains for work. By chance, he meets the beautiful girl Suwana Shoko (Ayase Haruka). Inspired by her, Yuki signs up for an experiment with an hourly wage of 110,000 yen. Nine people, including Shoko, Iwaki (Takeda Shinji), and Andong (Kitaoji Kinya), also participated in the experiment. They were taken to a house in the suburbs by two white luxury cars, where they will spend the next 7 days in complete isolation. However, high returns are often accompanied by high risks. During this period, people continue to die. The survivors must not only be careful to save their own lives, but also actively track down potential murderers. In the small room, there are many shadows and dangers... This film is adapted from the mystery novel by Yonezawa Honobu.