A tough woman is dragging a weaker man deeper and deeper into crime. Woman cop Miki is chasing a wanted man when she stumbles on a crashed car and sees the driver, Koichi, ignite spilled petrol to kill himself and his passenger. She drags Koichi to safety, but the passenger dies. Miki says nothing to challenge the inquest finding of `accidental death', and when she visits Koichi in hospital he begins to understand that her complicity in his crime implies a sexual invitation. But a gumshoe has photos of the crash, and the only way to stall his blackmail is to kill him, the first of several murders...