In 19th century Southern China, amidst the Opium Wars, a woman named San seeks justice after her family's tragic past.

Following her father's disappearance during the Gold Rush, racial conflicts lead to the death of many Chinese workers, leaving San's family struggling in China. Her mother, driven to desperation, becomes a courtesan and inevitably falls into an Opium addiction. Despite resistance, San and her sister are trained in her mother's footsteps until her outlaw father returns, offering a different path.

A few years later, after surviving an attack that claims her parents' lives and her sister abducted, San is left haunted and blaming herself.

She embarks on a quest for justice, torn between vengeance and the moral complexities of her past. As she hunts down those responsible for her family's demise, she grapples with whether justice is black and white, or whether she can reclaim agency over her life and use her pain to help others.