Moon, his wife and three children are all masters of Taekwondo in different styles. Moon hopes that his children will one day take over the gym he owns, but Taeju wants to be a pop singer while Taemi is only interested in romance. One day, the family becomes embroiled in a street fight with a band of thieves. Not only does the family recover the stolen property but does so with a dazzling display of martial art skill that brings the family notoriety. While they enjoy the spotlight, however, the master thief plans his revenge.