Taki Renji and Uzuki Reiichi, two second-year students who run the Takoito Research Club at an elite Kamakura high school, take on requests from students and teachers. A request from their beautiful classmate Fujimiya Miya leads them to a grisly case involving a white mansion and an unusual family in this school mystery.

Two high-school detectives pursue the truth behind a tragedy at a white mansion in Kamakura.