In the bustling and dangerous world of organized crime in Hong Kong, a young police officer named Chan infiltrates a notorious triad gang, whose leader is a cunning and ruthless criminal. As Chan earns the trust of the gang, his life becomes a constant struggle to keep his identity secret while fulfilling his duty. Simultaneously, the criminal, Ming, has also infiltrated the police as an undercover agent, leading him to a life of double-dealing and distrust.
Both characters are caught in a tense tug-of-war, each trying to discover the other's true identity while simultaneously dealing with their respective loyalties and the pressure from their superiors. As their paths cross and paranoia intensifies, Chan finds himself increasingly trapped in a dangerous game, where the lines between law and criminality blur.
The story unfolds amid intrigues, betrayals, and unexpected twists, culminating in a surprising ending that challenges the audience's expectations. The movie explores themes of identity, loyalty, and the price of life in the shadows, prompting us to question what it really means to be a hero or a villain. In this deadly game of cat and mouse, only one can come out on top, keeping the audience at the edge of their seats until the very last moment.