A Man Apart is a 2003 American vigilante action thriller film directed by F. Gary Gray and co-produced by and starring Vin Diesel as Sean Vetter, an undercover DEA agent who is on a vendetta to take down a mysterious drug lord named Diablo after his wife is murdered.

Released by New Line Cinema in the United States on April 4, 2003, it received generally negative reviews from critics and performed poorly at the box office.

In a prologue, biker drug distributor "Pomona Joe" receives a shipment in San Pedro and contacts South Central-area dealer Monroe "Overdose" Johnson to arrange a transaction.

Sean Vetter and Demetrius Hicks, lifelong friends who grew up together in Los Angeles, are former gang members who have become DEA agents.

Under their supervisor Ty Frost, they have spent the past seven years pursuing Memo Lucero, a Colombian national who controls an extensive drug cartel spanning northern Mexico and southern California.

Frost further notes that Overdose had ten phone calls with a Beverly Hills tanning salon operated by Slayton.

Slayton leaves to visit Hondo in Echo Park, executing him for making the calls from the salon and for botching the hit on Vetter.

Vetter and Hicks, posing as out-of-state drug dealers, visit Pomona Joe's Norwalk strip club and negotiate a sale.

The DEA sets up a sting operation at the San Pedro waterfront, where Vetter meets with Pomona Joe and Juan to purchase bulk cocaine.

During their conversation, Juan's boasts identify him as Stacy's killer, causing Vetter to viciously attack him, triggering a massive shootout.

Amidst the chaos, Hicks discovers that Vetter beat Juan to death, and shoots the corpse with a dead criminal's gun to cover it up.

Three DEA agents are killed in the firefight, and Frost puts Vetter on leave pending a psychiatric evaluation.

Vetter visits Lucero again, who encourages him to continue his investigation as a vigilante, and offers the location of Diablo's money stash in Mexico in exchange for a transfer to a safer prison.

Vetter and Hicks stash a tracking device in the money and hide aboard Slayton's plane while he completes the delivery.

Hicks observes Diablo's men entering the club on CCTV cameras and ambushes them, providing enough of a distraction for Vetter to overpower and kill his assailant.

After a prolonged delay, A Man Apart was finally released April 4, 2003 in 2,459 theaters and grossed $11,019,224 on its opening weekend, ranking #3 at the box office.