Tomoji Kamome is a freelance writer who lost his beloved daughter in an accident. In despair, his wife leaves him, and he spends his days like a shell of a man. One day, however, a flyer from a strange religious group, the "Heart Laughing Society," changes his fate. It shows the image of his wife, whom he has lost touch with... This is a story of faith and madness. What is the black darkness of the cult that an evil smile invites? A chilling “new religion” suspense begins!