Thai director Prachya Pinkaew ('Ong Bak', 'Warrior King') helms this martial arts action film.
A young autistic woman (JeeJa Yanin) with formidable fighting skills lives alone with her mother.
When her mother becomes ill with cancer, the girl finds a list of all the people who owe her money.
One by one she tracks them down and forces them to cough up the money to pay her mother's medical bills - but what she doesn't know is that most of the debtors belong to a powerful gang known as No. 8, and that her recent acts of violence have taken her straight to the top of the gang's hitlist...