As a girlfriend of Thai thug boss Zin is involved in lots of dark schemes, illegal money and financial manipulations. Suddenly she falls in love with Masashi who is a member of Japanese Yakudza and who temporarily lives in Thailand. When Thai thug boss finds out everything about their love, he separates Zin and Masashi in a way that Zin even doesn’t tell Masashi that she is pregnant with his baby. Zin gives a birth to a daughter Zen who has an autistic disturbance. Zin has no idea how to help to her only child, but when Zen becomes older she finds out her special talent herself. They live next door to a military art school and everyday Zen watches and soaks up the students’ techniques. Zen also watches Kung Fu films which also helps her to nourish her talent. When Zin suddenly needs expensive medical treatment, Zen and her only friend Moom find an old notebook. They now know that some people owe money to Zen’s mother and this amount of money will be enough for Zin’s chemotherapeutics. But the teenagers have no idea about the past life of Zin and that they will need to meet the most dangerous mobs of Thai and try to persuade them that they owe them a large amount of cash!