In a quiet, rural village in South Korea, a lonely, single mother looks after her mentally handicapped son while scraping a living as an acupuncturist. But her simple, poverty stricken life is suddenly transformed into a dark web of death and deceit when her son is arrested for the brutal murder of a local school girl.

Convinced that her son has been framed, and faced with a corrupt, complacent police force, she decides to solve the case herself and prove his innocence. It’s a quest for justice that leads her into a horrifying world of violence and despair. But how far will she go to uncover the truth.