Detective vs Sleuths is a 2022 Hong Kong action thriller film directed, co-written and co-produced by Wai Ka-fai, starring Sean Lau, Charlene Choi, Raymond Lam and Carman Lee.
[1] The film follows a former police with a mental disorder (Lau), who works with an elite inspector (Choi) in a series of murders which are seemingly connected to past cases they've once inspected.
Chan, a senior inspector of the OCTB, who also the only survivor in the Butcher case 17 years ago, believes Lee is the only hope to crack the Sleuths, requests his help.
The deeper they investigate of the Sleuths' motive of crime, they discover the secrets of the past cases beyond their imagination.
[11] Edmund Lee of South China Morning Post gave the film three stars out of five, writing, "its relentless parade of shoot-outs and explosions also make this quite an exhausting watch".