Nous sommes à Dowa, un royaume qui célèbre actuellement le 99e anniversaire de son monarque. Le lieu est composé de 13 circonscriptions qui sont gérées par ACCA. C'est au sein de cette organisation que travaille Jean Otis, le commandant en second de l'agence d'inspection de ACCA. En plus d'un bureau central dans la capitale, elle dispose de 10 agents chargés de surveiller les activités de chaque circonscription qui sont ensuite centralisées dans au bureau central.

Nous suivons ainsi les nombreux déplacements de Jean dans le royaume afin de vérifier par lui-même la situation des différentes zones et l'état du personnel présent sur place.

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.

In Rokkusu District for an audit, Jean finds Grossular visiting his homeland. Jean has an honest conversation with Grossular about his thoughts on the coup rumors before he departs. Back in Badon, the Inspection Department staff are abuzz with plans to celebrate the coming new year. Eventually, they decide to go to the party held at Jean's apartment complex. Jean welcomes the new year surrounded by his colleagues.

While Jean is away on an extended trip to audit three districts in a row, there are signs of unrest that begin to close in on Lotta. Magie contacts Rail that Lotta is in danger upon learning of the events set in motion. Rail acts to protect Lotta, but the shadowy figures draw ever closer.

Various wheels begin to turn at ACCA Headquarters as the prospect of a coup looms ever closer. After receiving yet another cigarette in Yakkara, Jean heads to Pranetta where only rocks and sand can be found and the denizens live underground. Despite living under such harsh conditions, the people of Pranetta are full of hope that their mining industry will succeed.

Jean arrives in Furawau District to conduct his final audit this round, where he receives the red carpet treatment from the Lilium family. Furawau residents are full of cheer, and their land is plentiful with blooming flowers, but Jean cannot avoid sensing invisible forces at work under the surface.

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...