The White Storm 3: Heaven or Hell

In this gritty crime thriller, Hong Kong police agent Cheung (played by Aaron Kwok) goes deep undercover to infiltrate Kang's (Sean Lau) powerful drug cartel. Simultaneously, another cop named Au (Louis Koo) manages to insinuate himself into the trust of the cartel members. As the trio work closely together, a bond of brotherhood forms between them. However, when the Hong Kong police dismantle the syndicate in an operation, Kang retreats to the lawless Golden Triangle region of Southeast Asia. There, he receives a shocking tip-off that one of his closest allies has betrayed him, setting off a tense chain of events and a test of loyalty. As Cheung and Au pursue Kang through the dangerous underworld, they are forced to confront their own blurred lines between duty and friendship.