Molestation cases are occurring frequently on a certain train line.
Strangely, none of the victims have come forward, making the investigation difficult.
Amidst this, T, a former pharmaceutical company researcher, emerges as a suspect.
In order to get to the bottom of the case, elite investigator Shiramine is deployed in an undercover operation.
The undercover operation is successful, and T begins groping Shiramine's body.
However, Shiramine loses himself in the pleasure that seems to consume his entire body...