Plot
After World War III (or the Terror Wars), governments dissolved. Megacorporations took over and fought for control until eight survived and divided their territories, with North America falling under the control of the strongest company - the Tekken Corporation. In order to maintain peace and power, the corporations began hosting an annual fighting tournament known as "Iron Fist" (named after the corporations' collective name). Representatives from each corporation battle until one is left standing and receives not only stardom and wealth for themselves, but also global glory and honor for their respective corporation.
In the year 2039, Jin Kazama lives with his mother, Jun, in the Anvil, a slum area surrounding Tekken City. Jun raised and trained Jin by herself, never speaking of his father, claiming him to be dead. A rebellious young man, Jin makes money as a contraband runner for resistance groups that fight against the corrupt Tekken Corporation, much to Jun's disapproval. Jin wishes to enter the Iron Fist tournament in order to earn money more legitimately, but Jun forbids it, claiming that what the tournament represents was the very thing that ignited the Terror Wars.
One night, after a run, Jin is targeted by the Jackhammers, the elite specs group that patrols the Anvil and ensures the safety of Tekken City, resulting in Jun's death. Devastated, Jin swears revenge against Heihachi Mishima, chairman of the Tekken Corporation. In the ruins of his former home, Jin finds a Tekken Fighter I.D. belonging to Jun, revealing she was once an Iron Fist fighter. After winning a wild card berth in Iron Fist by defeating the disgraced Marshall Law, Jin goes to Tekken City, sponsored by former boxer Steve Fox.
Upon entering Tekken City, Jin befriends mixed martial artist Christie Monteiro. He wins his first match against Miguel Caballero Rojo, nearly killing him in a fit of rage. Heihachi's son, Kazuya Mishima, is impressed and offers Jin a place in Tekken Corporation, but Jin refuses. Later that night, Jin is attacked by Nina and Anna Williams, at Kazuya's request. Jin survives the assassination attempt, thanks to Christie's interference. Jin vows to win Iron Fist and to kill both Heihachi and Kazuya. When he gives Steve Jun's ID, he realizes he is her son, telling him that he knew her. During the quarterfinals, Christie defeats Nina.
Kazuya then has Heihachi imprisoned, effectively seizing control of Tekken. Jin narrowly defeats the elite swordsman Yoshimitsu. Jin, Christie, and Steve try to escape, along with Raven, leaving Nina, Anna, and Sergei Dragunov behind. Kazuya brings down some guards, causing a firefight. Steve, Christie, and Raven cover Jin but he walks across Heihachi's cell. Angry, Jin tries to taunt Heihachi, saying he is responsible for killing Jin's mother. However, since Heihachi is their only mean of escaping Tekken, Steve frees Heihachi and joins the group. In the gunfight, Raven is wounded and recaptured.
Fleeing to the Anvil, the group take shelter in an abandoned warehouse. Heihachi explains to Jin that the Tekken Corporation's true purpose is to restore order to the world. He also reveals that Kazuya raped his mother, making him Jin's father, and left her for dead. Heihachi took her out of Tekken City to the Anvil to keep her alive. Eventually, the group is located by Jackhammers, who kill Steve in a firefight and recapture the rest of the escapees. Before taking them back to Iron Fist, Kazuya orders the Jackhammers to execute Heihachi.
Back in Tekken City, Kazuya changes the rules of the tournament and now wants the fighters to fight to the death. In the Finals, Jin is forced to fight against Bryan Fury, who had already defeated and killed Dragunov, while Kazuya holds Christie hostage in the control room. At first, he is outmatched, but remembering his mother's teachings, Jin defeats Bryan to the elation of the audiences in the stadium, and in the Anvil. Infuriated by Jin's victory, Kazuya enters the tournament himself armed with two moon axes. The weaponless Jin is saved, thanks to a distraction by Christie, and pins Kazuya, who baits Jin by claiming that he remembers how Jun "put up quite a fight". Jin defeats Kazuya but refuses to kill his father.
Jin walks out of Tekken City's gate and is saluted by the Jackhammers, symbolizing his new role as CEO of Tekken Corporation and returns home to the Anvil, to a hero's welcome. In a post-credits scene, it is revealed that Heihachi survived his execution, with his captor Jackhammer standing down when ordered to do so.