In the film, Koo plays an officer from Hong Kong’s watchdog, the Independent Commission Against Corruption, who disguises himself as a criminal to probe the case. The villain in the film is is played by Raymond Lam.

P Storm is the fourth installment in the Storm franchise, with the previous films raking in over 100 million yuan in 2014; 200 million yuan in 2016 and nearly 450 million yuan in 2018.

The upcoming film has been running a cross-nation promotional tour of eight cities, including Wuhan, Chongqing and Shanghai, since March 25.