In 1863
Gainesville, Georgia, a time traveler armed with futuristic weapons slaughters five Confederate soldiers and steals their shipment of gold bullion. By 1994, time travel has been invented by Dr. Hans Kleindast, prompting the U.S. Department of Justice to establish the Time Enforcement Commission (TEC) to prevent alterations to history. Travel to the future is impossible, but changes to the past can create ripples that reshape the present. Senator Aaron McComb volunteers to oversee the TEC, while police Commander Eugene Matuzak becomes its first commissioner. Detective Max Walker is offered a position, but before he can accept, he and his wife, Melissa, are attacked at home by unknown assailants. Walker survives, but Melissa is killed in an explosion. By 2004, Walker is a veteran TEC agent. He travels to 1929 to apprehend his former partner, Lyle Atwood, who has been exploiting knowledge of the
Wall Street Crash for financial gain. Atwood admits he is working for McComb, who is secretly funding his failing presidential campaign through illicit time travel, but refuses to testify for fear McComb will erase his family. Atwood is executed, and Walker grows suspicious of McComb. After surviving another ambush, Walker is partnered with rookie agent Sarah Fielding. They travel to 1994 to investigate a disturbance and witness the younger McComb about to be bought out of a computer chip company by his partner, Jack Parker. The 2004 McComb arrives, warns his younger self of the chip's future value, and kills Parker. He also cautions his younger counterpart against making physical contact, since two versions of the same matter cannot coexist without mutual destruction. Fielding betrays Walker, revealing she works for McComb, but is gravely wounded in the ensuing gunfight as McComb escapes. When Walker returns to 2004, he finds history altered: McComb is now a wealthy presidential frontrunner who has shut down the TEC. With Matuzak's help, Walker deduces that McComb is using Kleindast's original prototype and returns to 1994, though Matuzak is killed by McComb's men in the process. McComb concludes that Walker must be erased from history before he joined the TEC. In 1994, Walker tracks down Fielding in a hospital, hoping to have her testify against McComb, but she is murdered by McComb's assassin while Walker is destroying evidence of her hospital stay. He inadvertently discovers Melissa's records, revealing she was pregnant when she died, and realizes he has returned to the day of her murder. He finds her and convinces her to stop his younger self from leaving home that night. At the Walker house, McComb's henchmen attack, forcing both versions of Walker and Melissa to fight them off. The 2004 McComb arrives, takes Melissa hostage, and threatens to kill her with explosives. Confident his younger self will rise to power without Walker's interference, he is caught off guard when Walker lures the 1994 McComb to the house. Forcing the two McCombs together, Walker causes them to merge into a grotesque mass that disintegrates, erasing McComb from existence. He rescues Melissa and leaves her beside his unconscious younger self before the house explodes. Back in 2004, Walker finds history restored: Matuzak and Fielding are alive, McComb vanished without a trace in 1994, and at home, Walker is reunited with Melissa and their young son. ==Cast==