A rare dagger that costs millions of dollars and is a national treasure for Thailand is kept at a museum. Sd company invites a family of tae kwo ndo experts to perform in order to celebrate the exhibition of the treasure. A mobster wants to steal it and plans a mission. The two teenagers of the family get involved accidentally and take it back. The mafia boss is frustrated and decides to pay back them. Moon, the father, send the youngsters into his brother camp to save some time until the police arrest the mafia. But the mobster follows the tae kwo ndo champions and a lot of fights are happening. A battle to the end for regaining back the dagger. Excellent co-production from Thailand and South Korea. Funny characters and great actions scenes.