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.

Wayne Lai Yiu-Cheungas Lau Sing
Sheren Tang Shui-Manas Cheng Kau-mui
Raymond Ho-Yin Wongas Yeung Yeung
Ngo Ka-Ninas 'Spareribs' Tong Kat
Nancy Wu Ting-Yanas Ma Lai-wah
Elliot Ngok Wahas Cheng Long-kwan
Evergreen Mak Cheung-Chingas Leung Fei-fan
Fala Chenas Lau Ching
Susan Tse Suet-Sumas Cheng Long-hei
Ben Wong Chi-Yinas Cheng Siu-hong
Cheung Wa-Biu