The power to do miracles is not merely a supernatural phenomena; it is a gift that only a few people have. "Minimum," or minor miracles, are exceptional abilities possessed by a restricted group of people known as "Minimum Holders." The "Minimum Holder PI Duo," Nice and Murasaki, run the detective agency Yokohama Troubleshooting, or Hamatora for short. Their office is a single table in Cafe Nowhere, where they and their employees wait for new clients. Suddenly, the tasks they start getting seem to have peculiar ties to the serial murderer that their friend Art, a police officer, is looking for. The murder victims all have one thing in common: they are all Minimum Holders. Nice and Murasaki, both holders, are drawn to the case—but what exactly is the link between Nice and the one who orchestrates it all?