Yano, a former gangster runs a detective office with a 2nd grader girl named Shiori. His main job is to tackle cases which normal law and common sense cannot intervene. Instead, Yano uses his experience in the underworld and solves them in his own way. One day, Yano receives a sudden phone call… a job request. But when he arrives at the meeting spot, he finds a dead shot body! Then, a masked man attacks him and makes Yano into a murder suspect. As Yano goes through his investigation, he discovers that the true identity of the dead body is a man who was supposed to be dead 3 years ago. As he follows the trail of this case, it gradually leads Yano to a gigantic intrigue plot.