The film is a joint venture between mainland China and Hong Kong production companies,[3] originally set for release at the end of 2018 in both territories,[4] the film's release was delayed due to trouble getting approved by mainland China's National Radio and Television Administration.

[10] Where the Wind Blows was selected as the Hong Kong entry for Best International Feature Film at the 95th Academy Awards, but was not nominated.

Nam and Lui, the brains and the brawn working in perfect unison, respectively become Chinese Chief Detective of Hong Kong Island and Kowloon / New Territories in 1962.

In the 1970s, Peter Godber, Deputy District Commander of Kowloon, flees for United Kingdom to avoid local corruption charges.

The project was first announced at the 2017 Hong Kong Filmart in March 2017 slated to respectively be directed by and star Philip Yung and Aaron Kwok, whom have both previously collaborated in the 2015 film, Port of Call.

Kwok, Leung, Tam and Chow will portray the "Four Great Sergeants" (四大探長) of Hong Kong who were notorious for accumulating mass wealth from corruption.