We are at the end of our rope

This work is adapted from Utsumi Yae's manga. It is a suspense film that depicts a 52-hour cruel class reunion that changes the outlook of life. Twenty-three people from Class 2, Grade 6, who gathered at their alma mater for a class reunion, were imprisoned by classmate Mikio Yumensaki, and were involved in a major incident in which 13 of them died. The purpose of mikio is to "test how long a person's 'good nature' can be maintained under the extreme state of life crisis." In the gradually chaotic order, revenge, bullying, betrayal, exposure, etc. unfolded among the former classmates.