A shady group kills a young man but fails to recover the bag he stole. To get it back from a subway lost and found, they hack into its control room and stage a train hijacking. Furuhata happens to be on the scene, but the plot proves too complex for him to unravel in one episode.

Furuhata leaves the station with the suspect, intent on dropping off the ransom money. How will he prove the culprits true identity, and what is his opponent planning?