Zen, an autistic teenage girl with powerful martial arts skills, gets money to pay for her sick mother Zin's treatment by seeking out all the people who owe Zin money and making them pay.
Amid the mist in the lush green mountains of the northern most part of Thailand, at a hill tribe village that is full of fun and laughter, Tee Por, Lor Sha and Ma Zhu, three good-humored hill tribe men who are naive but not naive.