Hye-ri Kim

A young girl who lives with her cruel stepmother and sister, accidentally meets 3 young and rich cousins who live a luxury life in a big mansion and is hired by the boys grandpa to look after their bad behavior.

Taekwondo champion Kim quits fighting to care for his daughter Sa Rang. An evil kingpin kidnaps Sa Rang, forcing Kim into a rigged boxing match against unbeaten Jack Miller to secure her release.