Stan Marsh, Kyle Broflovski, Eric Cartman and Kenny McCormick are playing World of Warcraft but are briefly interrupted by Randy Marsh telling Stan to socialize, but is told he is busy playing the game. Returning to the game, Stan, Kyle, Cartman and Kenny are soon killed by a player who is a much higher level than them, despite the boys having not agreed to a duel. The other player is in fact a stereotypical nerd.
The next day, the boys decide to phone the World of Warcraft support line at Blizzard Entertainment. A member of staff at the other end explains that the boys would have had to agree to a duel before fighting, but Stan informs her that the player just kills them regardless. The staff member says the problem will be fixed, but informs a co-worker that more people are complaining over their characters getting killed, and that they should tell the men upstairs.
In their main office, the administrators and Game Masters discuss the problem at hand, that if people's characters keep getting killed like this then they'll get frustrated and quit playing the game. They state that the player who is not playing by the rules has been playing World of Warcraft almost every hour of every day non-stop for the past year and a half, and has become so powerful that he's able to kill Game Masters and Admins (who can otherwise ban on sight). They state that he "has absolutely no life", and question how they can kill that which has no life.
At work Randy is playing World of Warcraft, and brags to his work colleague Nelson about how he is a brave adventurer in the game. From behind, the same player that killed his son's character, kills him.
In his basement, Cartman summons all his male classmates, specifically, Butters Stotch, Tweek Tweak, Jimmy Valmer, Timmy Burch, Token Black, Clyde Donovan, Craig Tucker, Jason, and Kevin Stoley, and explains how they shall all team up and kill the rogue player. Everyone agrees (along with a reluctant Clyde who Cartman compares to the French in World War II). Butters states he does not play World of Warcraft, but has been on his computer so long because he has in fact been playing Hello Kitty Island Adventure. Cartman tells him to buy World of Warcraft and join the online war sensation or else he threatens that everyone will murder him (beat him up).
On the game, the boys prepare to attack the rogue player, but ultimately fail (no thanks to Clyde who has stopped playing to read his Playboy magazine and Butters, since he made his character look like Cartman). Everyone apart from Cartman gives up and exclaims they're quitting.
In the basketball court, Cartman interrupts Stan, Kyle and Kenny's game explaining how they should play World of Warcraft, and do something that matters. Cartman says they can try and get up to a really high level by killing boars in the woods (where player vs. player combat does not work), but boars give low experience points so the boys begin their mission to kill millions of them. As time progresses they begin to gain weight until they are all the size of Cartman, yet Cartman is still fatter because he has doubled in weight.
Three weeks later, the staff at Blizzard Entertainment explain that four players (the boys) have increased their levels incredibly quickly and that they could be the people who save World of Warcraft. One of the staff states that these players could be the ones that legend said would be able to wield the 'Sword of a Thousand Truths'. Another staff member quickly informs the other that they are not to speak of the sword. The group then goes to get the sword's USB stick and decide that these players could use the sword to stop the rogue player.
In Cartman's basement, the boys prepare for the battle. They target their enemy and begin to fight. Liane Cartman is supplying the boys with everything they need (including a bowl for Cartman to defecate in). Kyle gets a severe case of carpal tunnel, and Cartman has to give him cream to rub on his hand.
At Stan's house, Randy opens the door to two members of the staff from Blizzard Entertainment, who state that they need to give Stan the sword, or his character will die. Unfortunately, Stan is not in his bedroom, and Sharon Marsh informs Randy that Stan has took his computer to Cartman's house. The Blizzard staff explain that it's too late now, and they don't have accounts which they can use to give Stan the sword. Randy explains he has one, but he is a noob. The Blizzard staff say they can't give the sword to a noob, but Randy convinces them that they don't have a choice.
Randy manages to hijack a car and he and the Blizzard staff rush to an electronics shop. They rush to the World of Warcraft demo. Randy signs in and manages to give Stan the sword (after being shown how to pass things from one player to another). Randy is then hit, but Stan lifts the sword, telling the player that he killed his father, and blasts the sword into him. The rogue's defenses are lowered dramatically, and the boys shoot him with an arrow, firebolts and finally, Cartman (after uttering the immortal line "Looks like you're about to get pwned!") kills him by crushing his head with his hammer.
The defeated nerd looks at his computer screen in disbelief as his character has been killed. The boys celebrate their victory (as do Randy and the Blizzard staff along with the other World of Warcraft players). The boys see themselves as heroes, and Stan questions what they should do now. Cartman explains they can finally play the game now, which they do.