In the rainy city, evil desires are rampant. Inadvertently cruel and bloody hunting cases occur one after another. Some people are bitten to death by hungry dogs, some are cut off from the same weight of meat as when they were born, some are cut in half and given to their wives and lovers, some are frozen in the freezer to keep their youth forever, and some people's mouths are filled with nails of all sizes. The detective of the first investigation, Sawamura Hisashi (Oguri Shun), who is troubled by family conflicts, was ordered to investigate the matter. As the investigation deepened, he found that the murderer was all one person, and he was keen on committing crimes on rainy days. Later, he found that all the dead were related to a case many years ago, and Sawamura's wife (Ono Machiko), who ran away from home, was also involved. The race against time to track down, the murderer has shown his fangs to Sawamura... This film is adapted from the original work of the same name by Japanese cartoonist Ba Liangjie.