The film begins with a nuclear explosion in Texas, which sparks a full-scale war between the U.S., the Middle East, and North Korea. Kelly's central character is action-movie star Boxer Santaros (Dwayne 'The Rock' Johnson), who is suffering from a bout of amnesia upon returning from the desert. His reasons for being in the desert are hazy, but he's hooked up with porn star Krysta Now (Sarah Michelle Gellar), and together they have written a screenplay about the end of the world. Santaros tries to prepare for the film by taking a ride with a cop named Taverner (Sean William Scott). But the cop is actually Taverner's twin brother, who is working for a shadowy group of neo-Marxists who are trying to overthrow the government. Meanwhile, a brilliant scientist (Wallace Shawn) unveils an incredible new energy source, the end of the world as predicted by the Book of Revelations draws ever closer, and Justin Timberlake (who plays an Iraqi war veteran) provides a voiceover that fills in some of the gaps. As the film builds to its explosive climax, the reasons for Santaros's time in the desert become clear, and the various strands of the plot are brilliantly woven together.