Black Girl is a deaf-mute prisoner. Prison guard Deng Hong found White Fox, a prisoner who understands sign language, to supervise her transformation. The two made money together after serving their sentences, met Deng outside the prison.

A crime-fighting cop maintains a zero-crime rate and faces job loss, so he decides to fabricate a major case, unaware that actual grave robbers are targeting a treasure-filled tomb located directly beneath his police station.