Dowa kingdom is comprised of thirteen autonomous districts. Their peace is maintained by a single massive organization, ACCA. Deputy Chief Jean Otus of ACCA Headquarters Inspection Department is in charge of conducting ad hoc audits of the thirteen district branches. As he is about to head to Famasu District, however, ACCA's Five Chief Officers announce that the Inspection Department is to be shut down due to its perceived obsolescence in peaceful times...

Constable Rail, the rookie agent of ACCA's Badon branch, has a profound dislike for elite agents in ACCA headquarters and has it out for Jean. Meanwhile, feeling watched, Jean asks for his friend Nino's help. With rumors of a coup d'état circulating among the upper echelons of ACCA's hierarchy, Chief Officer Grossular announces at the Five Chief Officers meeting that he has obtained credible information about the coup.

With preparations for the ACCA centennial anniversary cereonomy underway, Prince Schwan goes to Badon to represent the Dowa royal family in his father's stead. Meanwhile, the five chief officers, senior officials, and district representatives secretly gather in ACCA headquarters' central meeting room to make their own final preparations for the coup. The day of the ceremony, the district office plaza is full of citizens. The future of the kingdom is about to be decided...