One day, an explosion occurred in a studio within the jurisdiction of the Tsukishima Central Police Station. According to the on-site investigation, the explosion may have been caused by a gas leak. Detective Satoshi Seimura (Takaya Kamikawa) was very interested in the debris left at the scene. He tried to restore the fragments and found that it was an incense burner. Although there may be no direct connection, Seimura still sent it to Muraki Shigeru (Masahiro Komoto), who works at the Metropolitan Police Department's Research Institute, for identification. Unexpectedly, he suddenly found something very interesting. Not long after, another explosion occurred in the jurisdiction, resulting in the death of a member of parliament attending a celebration. The suspected terrorist incident caused a shock in the Metropolitan Police Department, and the police were in chaos. The preliminary results of the on-site investigation found similar debris of an incense burner again. The confusing truth gradually surfaced, and the conspiracy of the faction was revealed...