July 22nd for the fourth time. Minamikata Hizuru, the woman who met Shinpei on the ferry and told him the name "Nagumo Ryuunosuke". Her homeland is also Hitogashima, and she has returned home for the first time in 14 years to unravel the mysterious message left on her cell phone. Hizuru, who knows about the existence of the “shadows” and “Heine”, joins the hunter Nezu and discovers that many of the islanders have been replaced by “shadows”.