A taxi robbery and murder occurred in Fukagawa late at night. Detectives Nagata and Miyagawa of the Metropolitan Police Department's First Investigation Division, who suspect the perpetrator as a habitual offender, flew to Yanagibashi using the remains as clues, and suspect a forester, but before this case was closed, a new incident using the same method occurred in Shinbashi, and this time the driver's corpse was not found.