Ling-wu Chung, a senior student of the Wah Mount Sect, was not at all brilliant when he joined the Sect, but was soon taught to master the sword by a legendary swordsman Yeung. Chung’s master, Kwan, resented this and drove Chung away. In order to get hold of “Kwai Fa Bo Din”, the book on the most powerful martial art, Kwan diverts attention by secretly creating troubles everywhere. Chung, on the other hand, becomes the leader of the Hang Mount Sect by chance and falls in love with Kwan's daughter. When she betrays him, he turns to the daughter of the Devil Sect leader, and thus causes a love triangle between them.

Set in the late 1930s to late 1940s in Canton, Republic of China during World War II, No Regrets is an epic drama that centers on a triad family, the Canton police force, and the Japanese occupation of the city.