Three consecutive murders occurred at an isolated island hotel, "Hoozukikan." The case appeared solved through the deductions of master detective Dojima Itami, but the true culprit, Sato Sama, knows the reasoning is wrong. While the innocent Amaya Nagi awaits trial, Sama grows curious about her past and begins an independent investigation. Meanwhile, Itami discovers evidence of a hidden passage and reopens the case. An ambitious work weaving classic detective fiction tropes into a legal mystery framework, told from two intersecting perspectives.

A challenge to the taboos of detective fiction! What happens when a storybook detective is dropped into a courtroom drama that demands realism?