Martial arts action set in Thailand. After emmigrating from Korea to open a taekwondo gym in Bangkok, martial arts master Mun (Cho Jae-hyeon) hopes that his family, all taekwondo experts, will eventually take over the running of the gym. But when son Tae Yang (Tae-joo Na) foils a gang's attempt to steal a priceless antique dagger, the family find themselves under threat from the gang's leader, who swears bloody revenge.