The $18m film, which marks the Vietnamese director's English-language debut, has been shooting in Hong Kong for the past two weeks and will move to Los Angeles at the beginning of October. The production also filmed in the Philippines for one week.
Harnett plays an LA cop turned private detective who travels to Hong Kong to search for the missing son of a Chinese billionaire.
Fernando Sulichin's Paris-based Central Films and Jean Cazes are producing with John Kilik as executive producer. Backing comes from France's Canal Plus, UK fund Aramid and France's Sofica tax shelters. France 's TF1 International is handling international sales.