The main character is Yukiko, a member of the Information House family business. Ostensibly, it is in the guise of a Japanese-style bar run by the owner, Masashi Himura (Masamama), There, peers, detectives, journalists and other habitual characters come and go. She handles information, conducts investigations when asked by clients and also performs detective work, She makes his living trading independently researched information.

The main character, still a newcomer, is taught his job by "Himari Hibino," an educator of the same age group, He spends his days in back alleys and abandoned factories, receiving information and performing simple tasks such as consigning work to other offices. Just as he was getting used to his job, he received a report that a secretary for a large company had died mysteriously...