Three years ago, the school bus of the "Eternal Forest" academy carried four girls and slipped into the fog of Kamikakushi. The only key survivor found, Mai Shinonome, woke up after three years of sleep but lost her memory. Wide-area investigation officer Kenzo Hoshizaki (played by Joe Odagiri) and his partner Sae Kitajima (played by Chiaki Kuriyama) came to Minami Atami, which is full of exotic southern island style, to assist the local police station in investigating the case. As soon as the two entered the country, they encountered a strange old lady holding a two-color lollipop. The mysterious side of Minami Atami quickly appeared in front of the pair: the teachers and students of the academy seemed to be hiding something, the mayor and the citizens also behaved strangely, and there were several strange places and inexplicable NGO organizations in the city... As the investigation deepened, not only did the truth of the Kamikakushi case become more and more confusing, but the endless mysteries in the local area also made Hoshizaki and Kitajima involuntarily fall into it, and it was difficult to turn back... "Minami Atami may be heaven." What is the deep meaning of this slogan on the entry welcome sign? Japanese eccentric director Miki Satoshi once again presents a work with in-depth topics!