A police officer receives a worn-out and traumatised woman who begs him to take actions against a ruthless man that ruined her life, and only gives his moniker, Tín Mã Nàm, meaning “crazy horse” in Cantonese. As the officer sets out to search for Tín Mã Nàm, a network of intricate crimes, espionage and bloody murders beyond his imagination begins to unfold.

Severely injured, Trang is taken by her Vietcong comrades to hide in a civilian’s house. There, she encounters An, the son of a South Vietnamese police officer. Contrary to his cold and stern appearance, An secretly orders his men to spare Trang’s comrades and sercretly brings her home to nurse her back to health. From that moment, a deep and complex bond begins to grow between the pair.

At the behest of her ailing father, a woman reluctantly tries to forget the lover she has been awaiting for years.