When Zin, a former girlfriend of a Thai Mob Boss, falls for Masashi, a Japanese gangster in Thailand, the boss banishes them. Mashashi to Japan, and Zin along with her small daughter Zen to live next to a Martial arts school. Zen is autistic with uncannny swift reflexes. She watches students next door and Kung Fu moviesabsorbing every technique. She's now a teen, and her mother is undergoing chemotheray. Zin takes in a chubby boy nameed Moom, who watches over Zen. Moom finds a ledger buisness men who owe Zin money; he goes to one at a time to collect in order to pay for Zin's treatment. Zen, with her martial arts skills, becomes his enforcer. A showdown with the boss is inevitable.