Fifty-four schoolgirls join hands on a station platform and step in front of an oncoming train. Saya Kota is the only one who gets up afterward, and back at school she says almost nothing about it before quietly beginning to gather other girls into a suicide club of her own. Her closest friend Kyoko watches her turn into a stranger and starts digging into who is behind the club. Usamaru Furuya keeps the film's opening scene and then takes the story somewhere else entirely.