The power to perform miracles is more than a supernatural occurrence; it is a gift that appears in only a few humans. "Minimum," or minor miracles, are unique abilities held exclusively by chosen individuals known as "Minimum Holders." The detective firm Yokohama Troubleshooting, commonly referred to as Hamatora, consists of the "Minimum Holder PI Duo," Nice and Murasaki. Their workspace is a solitary table at Cafe Nowhere, where the pair and their colleagues wait for new clients. Suddenly, the cases they start to take on appear to have odd ties to the serial killer that their friend Art, a police officer, is hunting. The murder victims share one common trait: they are all Minimum Holders. As holders themselves, Nice and Murasaki are pulled into the investigation—but what precisely is the connection between Nice and the mastermind behind it all?