A suburban town is shaken by a series of mysterious child disappearances, and suspicious adult deaths. A rumor begins to spread on the internet that any adult who suddenly encounters a returned "child" will die mysteriously three days later.Local newspaper reporter Shunya Ezaki (Daiki Arioka) refuses to believe that children are killing adults, and begins to investigate the truth behind the strange deaths. Meanwhile, Shunya's girlfriend and nursery school worker Naomi Harada (Mugi Kadowaki) waits for the mother of a young boy to come and pick him up, but day turns to night and there is still no sign of her, leaving Naomi with no choice but to look after the boy herself. Before long, they are stalked by a shadowy figure, the "Kodomo Tsukai"(Hideaki Takizawa) Eventually, the boy goes missing. This turns out to be only the opening act of a horrific ordeal for Shunya and Naomi, whose fates are sealed when they cross paths with the Kodomo Tsukai...