Synopsis

A mysterious drowning victim is discovered in a river marking the jurisdictional boundary of Wangan Police Station—his abdomen grotesquely stuffed with a teddy bear. Around the same time, a theft occurs within the police station, with receipts and a coin purse stolen from a Criminal Affairs Division desk. Soon after, a high-ranking Metropolitan Police Department official living within the precinct – specifically the Deputy Superintendent General – is kidnapped for ransom, prompting the establishment of a special investigation headquarters at Wangan Station.
 
However, the task force conducts its operation in strict secrecy, refusing to cooperate with the local detectives. Frustrated by their exclusion yet determined to uncover the truth, Aoshima Shunsaku and his team push forward with their own investigation into the bizarre drowning case.
 
As tensions rise, the task force ultimately fails in its ransom exchange attempt, forcing them to abandon secrecy and launch a full public investigation…