I want to help, I want to be saved, I want to help. One day during summer holiday, best friends Nemoto and Maruyama are walking along a mountain path when suddenly a gunshot rings out and Nemoto falls. Maruyama barely manages to hide behind a roadside block, but Nemoto is seriously injured and unable to move. At first Maruyama tries to help, but the persistent and invisible killer frightens him and he is unable to do anything about it. Root begins to blame him, and says that the killer is after...