An honest cop who may have inadvertently killed his partner during a particularly intense raid finds his life in danger when the grown-up sons of both the fallen the cop and the deceased kingpin who was killed in the chaos come gunning for him in a tense police thriller co-directed by Marco Mak and Wong Jing, and starring Hong Kong film legend Anthony Wong. Huang (Wong) is a righteous police officer haunted by a harrowing accident. It's been ten years since the fateful raid that resulted in the death of both his partner and the most feared criminal on the streets, and though the men's sons have grown older, their vengeance still burns as hot as ever. Now, as Huang is assigned the task of protecting a vile gangster and his teenage daughter (Gillian Chung), he is about to face a whole new danger as the sons of the fallen men attempt to decide if they should go after the man responsible for their father's deaths either alone or together.