Lung (by Ronald CHENG) and his daughter Ying (by Shun Ying FU) are each other's only dependence. Due to the gambling debt of Lung's ex-wife, they are living a dreadful life, but Lung never complains and optimistically believes in good karma for good people. After rain comes a rainbow, Lung pays off all his debt and decides to make Ying's dream come true by taking her on a Thailand trip. Unfortunately, Ying is taken by the kidnap gang during the trip. Losing his girl, Lung abandons all his faiths; he even married a Thai Chinese, Lan (by Chrissie CHAU), in order to stay in Thailand. Lung keeps gathering information of the kidnap gang for two years, he eventually turns into a bloody revenger. Can he retrieve his virtue at the end or will he become a sinner suffering from endless hatred?