After 54 schoolgirls unexpectedly commits suicide by jumping towards a moving train, police investigates whether this is the work of a "suicide club". After a tip from a mysterious hacker who lables herself "the bat", it is revealed that a certain website actually lists the number and gender of all the people before they actually kill themselves. Other than that, at the scene of some suicides, a white bag is left behind. This white bag contains the sewn together pieces of skin from the victims. The police must work to solve this mystery before the reason for death spread towards the entire country. This whole movie revolves around an innocent pre-teen pop group called Dessart. What part do these kids play in the present crisis?