On the surface, it's a Japanese-style bar run by "Miyabi Himura (Mama Miyabi)," a mama-san, but it's frequented by quirky individuals such as fellow professionals, detectives, and journalists. They handle information, conduct investigations at the request of clients, perform detective work, and make a living by buying and selling information they've gathered independently.

The members had been handling medium-sized jobs for a while, as there hadn't been any major cases, but then a secretary of a Diet member, who is a regular, comes to visit.

The secretary says that his highly educated son has become obsessed with a new religion that has sprung up in a certain region and won't come home. "I want you to somehow bring my son back," the secretary said. The members are eager to take on this big job after a long time.

Miyabi, with a hint of unease, decides to accept the request...