At night, one by one, they die. Until they find fault with each other. "I will execute the final suspect." After high school, each of them was living a normal life in their own place, in their respective places. But one day, they all are kidnapped by a mysterious man, and when they wake up, they are being held captive in a run-down youth hostel. The group is told that they will be executing one suspect a day, and they are asked to vote to find the culprit......Can the group find the suspect and escape unharmed?