Liu Jian, an elite Chinese police officer, comes to Paris to arrest a Chinese drug lord. When Jian is betrayed by a French officer and framed for murder, he must go into hiding and find new allies.
When Hong Kong Inspector Lee is summoned to Los Angeles to investigate a kidnapping, the FBI doesn't want any outside help and assigns cocky LAPD Detective James Carter to distract Lee from the case. Not content to watch the action from the sidelines, Lee and Carter form an unlikely partnership and investigate the case themselves.
Hired assassin John Lee is asked by Chinatown crime boss Terence Wei to murder the young son of policeman Stan Zedkov. Lee has the boy in his sights, but his conscience gets the better of him, and he spares the child's life. Afraid that Wei will take revenge on his family in China, Lee seeks out expert forger Meg Coburn to obtain the passport he needs to get out of the country, but a band of replacement killers is soon on his trail.
An undercover police officer named Rock Keats befriends a drug dealer and car thief named Archie Moses in a bid to catch the villainous drug lord Frank Coltan. But the only problem is that Keats is a cop, his real name is Jack Carter, and he is working undercover with the LAPD to bust Moses and Colton at a sting operation the LAPD has set up.