In 1983, South Korea sent an undercover military unit to North Korea on a top-secret mission. On their way home, the special agents were mercilessly killed as part of a cover up. Years later, the mission's sole survivor, Jin-pyo, and his adopted son, Yoon-sung, return to South Korea to exact revenge on the five men behind the betrayal. One by one, Yoon-sung - the "City Hunter" - exposes his targets' crimes and delivers them to dogged prosecutor Young-ju. Jin-pyo, however, is out for blood.

Are you in trouble? Did you make an unsuspecting deal with a crooked businessman? Are dastardly villains threatening your life? Are you a beautiful woman? Well, then just write XYZ on the message board at the Shinjuku Station, and Ryo Saeba, troubleshooter, expert marksman and incurable ladies' man, will be there to rescue you before you know it. And his partner, the feisty Kaori with her trusty assortment of 100-ton hammers and mallets, won't be far behind...