With the Guild War concluded, the Armed Detective Agency and the Port Mafia are currently observing a temporary ceasefire.

Atsushi decides to undertake the investigation of a certain fatal traffic accident, while Kunikida becomes embroiled in a bombing incident that challenges his strict adherenceto his ideals.

While Kunikida's friend and former Agency member, a genteel young lady with black hair, the Port Mafia executives, and various people begin to move, the Russian "magician" Destoyevsky finally stands up silently...