[1] The drama, set in the 1930s Shanghai tells the story of three powerful business tycoons portrayed by Anthony Wong, Kent Tong, and Wayne Lai.

[2] It is based on a true story about three gangsters in the 1930s Shanghai whose names were Du Yuesheng (Kiu Ngo Tin), Huang Jinrong (Chak Kam Tong) and Zhang Xiaolin (Kung Siu San).

In a time when Shanghai was controlled by the merciless warlords, sworn brothers Kiu Ngo Tin (Anthony Wong) and Kung Siu San (Wayne Lai) have to rely on each other.

Ngo Tin (Anthony Wong) uses this opportunity to suppress both of them, becoming the sole leader of China's largest port city, controlling the police and the underground triads on both fronts.

[5] In May 2014, veteran former TVB actor Kent Tong was announced with Wayne Lai, Ron Ng and Pierre Ngo to be part of the main cast.

[6] The rest of the main cast (Myolie Wu, Louisa So, Kenneth Ma, and Natalie Tong) were introduced during a press conference held on 3 June 2014.