atau dikenal sebagai
A man with a briefcase is being pursued by a small yakuza gang. After abandoning his vehicle, the man boards a train where he and the other passengers watch a woman being assaulted by three thugs. Intimidated, the commuters do nothing to help. Later, the victim reports the incident to the police and a witness finally comes forward. When the man hears about rape on the news he takes steps to protect his identity and begins to track the victim.
The world's largest black pearl has vanished without a trace, and it's up to Detective Ippei to track it down. His only clue is the mysterious words of a dying man, who managed to mutter "Pussy Print!" before slipping away forever. Teaming with the man's younger widow Matsuko, Detective Ippei boards a local train and begins taking prints of the female passenger's vulvas in hopes of matching one to the print that Matsuka's husband had in his possession at the time of his death.