Taneno, an elite police officer who became obsessed with righteousness, attacks his wife, Mitsuko, with a goya (bitter melon) for pleasuring herself with it. As he leaves prison after serving his sentence, he accidentally boards a taxi offering illegal prostitution services. On board, he meets Omitsu, a woman who looks just like Mitsuko. His presence in the car sends her away from the taxi. The driver holds Taneno responsible and forces him to serve his taxi. Back in the force, Onari, a lazy cop, and Asadachi, a new recruit, begin their investigation on a suspicious taxi.
Narumi, who has an aggressive personality, stabbed her colleague and went to prison. After serving her time, Narumi is released and goes back to her hometown where she grew up. Narumi goes to her younger brother Kei's home. At a young age, their parents died in a accident and Kei is the only one left Narumi can rely on. After Narumi sees Kei and his girlfriend Kana living together happily, Narumi decides to take her brother back. Narumi reveals a secret between her and Kei.