"Bayside Shakedown" follows Detective Sergeant Shunsaku Aoshima (Yuji Oda) and Superintendent Shinji Muroi (Toshiro Yanagiba) as they navigate a series of events that turn their small Tokyo police station upside down. A body is found with a teddy bear crudely stuffed into its stomach, sparking a rivalry between the two precincts over jurisdiction. As the investigation unfolds, Aoshima and Muroi face bureaucratic red tape, corruption, and personal struggles, all while trying to solve the high-profile kidnapping case and uncover the truth behind the bizarre circumstances.