Osaki Kim is the father of a high school boy beaten to death with a baseball bat by a 14-year-old gamer. The killer obsessively played a violent video game in which one of the favored ways of killing is with a bat. The opening scene, before the interactive game play begins, is the Los Angeles courtroom in which the killer is sentenced "only" to life in prison after the judge and the jury have heard experts explain the connection between the game and the murder.
Osaki Kim (O.K.) exits the courtroom swearing revenge upon the video game industry whom he is convinced contributed to his son's murder. "Vengeance is mine, I will repay" he says. And boy, is O.K. not kidding.
O.K. is provided in his virtual reality playpen a panoply of weapons: machetes, Uzis, revolvers, shotguns, sniper rifles, Molotov cocktails, you name it. Even baseball bats. Especially baseball bats.
O.K. first hops a plane from LAX to New York to reach the Long Island home of the CEO of the company (Take This) that made the murder simulator on which his son's killer trained. O.K. gets "justice" by taking out this female CEO, whose name is Paula Eibel, along with her husband and kids. "An eye for an eye," says O.K., as he urinates onto the severed brain stems of the Eibel family victims, just as you do on the decapitated cops in the real video game Postal2.
It doesn't stop there either.