When insurance agent Yip Wing-shun (Carlos Chan) is called to visit Tak (Anthony Wong) and Ling’s (Karena Lam) home to follow up on a life insurance policy, he discovers their son’s corpse hanging in the bathroom. Principled and kind-hearted, Yip Wing-shun suspects that the child may have been murdered. As Yip Wing-shun digs for the truth, the real perpetrator turns the tables and forces Yip Wing-shun into a psychological battle of wills.