The One is a 2001 Revolution Studios action movie, starring Jet Li and Carla Gugino and written, produced and directed by James Wong and Glen Morgan with costume design by Chrisi Karvonides-Dushenko
The movie involves a superhuman criminal named Yu-Law (Jet Li), once a member of the organization policing interdimensional travel (via detecting wormhole openings, which can be predicted like the weather). In the movie The One, Jet Li seeks to hunt down and kill variations of himself in alternate universes to absorb a common life force that connects them all. By killing his other selves, and absorbing their power, he wishes to become as a god.
The only one who can stop him is the last of his alternate selves (MVC: MultiVerse Counterpart), Gabriel Law, who works in the Los Angeles County Sheriff's Department in a near-image of our own universe and, before the events of the movie, was unaware of the multiverse. Law is assisted by a member of the Multiverse Authority that Yu-Law once worked for, with the concern that if only one version of Yu-Law is left there will be catastrophic results for the entire multiverse.
This movie has been quite popular on ISawItIn.com, not only because it is an action film starring Jet Li, but because of the interest in the necklace Jet Li and his wife wore in the film.