Okay, first of all - "The Defender" is a very bad attempt to rename Jet's "Bodyguard From Beijing", directed and choreographed by Corey Yuen - only Hong Kong cinema's best kung-fu choreographer. He is most notable for the scenes he choregraphed in Jet Li's best kung-fu sequences in "New Legend of Shaolin". Corey Yuen (also known as Yuen Kwai) has also directed/choreographed "Warriors of Zu Mountain", "Fong Sai Yuk1&2", "Lethal Weapon 4", "Romeo Must Die", and "My Father Is A Hero."
Jet Li plays a bodyguard from China's top bodyguard-training city, who protects Christy Chung's character - the only remaining witness to a homicide case. This is one of Jet's few Hong Kong films with a modern setting. This is a very awesome kung-fu movie with some suspence, but more kung-fu scenes. Plot and characters are well-developed with mostly unexpected twists.
Directing, camera angles, intricate kung-fu choreography, and wonderful cast only manage to heighten the performance by Jet. Though the kung-fu choreography is not as intricate as in "New Legend of Shaolin", this is definitely a must-see.