Detective Inspector Lee, a dedicated and skilled police officer from Hong Kong, is devastated when his close friend Consul Han’s daughter, Soo Yung, is kidnapped during her first day in the United States. Determined to help, Inspector Lee travels to Los Angeles to assist in the investigation. However, the FBI, reluctant to involve an outsider, teams Lee up with LAPD Detective James Carter, a loquacious and somewhat reckless officer who is tasked with keeping Lee away from the main case. Despite cultural differences and clashing personalities, the two must work together to track down the kidnappers and rescue Soo Yung.

As Lee and Carter dig deeper, they discover connections between the kidnapping and a powerful crime lord named Juntao. Their investigation leads them through a series of dangerous encounters and numerous close calls, forcing them to rely on each other's unique skills. Along the way, they must learn to overcome their differences and cooperate effectively to unravel the criminal conspiracy. Their relentless pursuit of justice not only brings them closer to finding Soo Yung but also to exposing a greater plot that could have devastating consequences.