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One day, a sudden explosion occurred at a studio within the jurisdiction of Tsukishima Central Police Station. Based on the results of the on-site investigation, it was determined that the explosion may have been caused by a gas leak. Detective Keisuke Sato (played by Takaya Aga) was intrigued by the debris left at the scene and attempted to piece it together. To his surprise, the fragments turned out to be from an incense burner. Although there may not be any direct connection, Sato still sent it to his colleague, Shigeru Muraki (played by Masahiro Kabuto), who works at the Scientific Research Institute of the Metropolitan Police Department for identification. Unexpectedly, he discovered something quite interesting. Not long after, another explosion occurred in the same jurisdiction, resulting in the death of a politician attending a celebration. The suspected terrorist incident caused a stir at the Metropolitan Police Department, and the police became chaotic. The preliminary results of the on-site investigation once again revealed fragments of a similar incense burner. The truth gradually came to light, revealing a sinister plot...