Three years after the end of Rush Hour 2, Carter is no longer a detective, but a traffic cop on the streets of Los Angeles. Lee is now the bodyguard for his friend Ambassador Han, the former Consul from the first film. However, there is a rift between them as Lee is still upset at Carter about an incident in New York City where Carter shot (not fatally) Lee's then-girlfriend, Secret Service agent Isabella Molina (portrayed by Roselyn Sanchez in the second film), an event which led to their breakup. During the World Criminal Court discussions, as the Ambassador addresses the importance to fight the Triad, he announces that he knows the identity of the Triad leadership known as the Shai Shen. Unfortunately, an assassination attempt on Han's life takes place and he gets shot, disrupting the conference. Lee traces and pursues the assassin and eventually corners him, discovering that the assassin is his godbrother, Kenji. When Lee hesitates to shoot Kenji, Carter shows up driving towards the two but Kenji manages to escape. Read more Here
