After Shigeki Nagamine lost his wife, he cherished his only daughter Ema by himself until she became a high school girl. One night, however, Ema did not return home from hear part-time job, and her gruesome dead body was found afterward. A few days later, Shigeki receive a secret call giving the names and whereabouts of the criminals. After some indecision, he goes to the apartment he was informed of and rummages about the room. There he finds a video showing Ema being killed in such a cruel way. Shigeki accidentally kills Atsuya, one of the criminals who returned home, and moreover searches for a juvenile delinquent Kaiji, the chief culprit.