Richie Donovan, a professional thief, is deeply indebted to his boss, Groznyi, for being smuggled into the U.S. as a child. After a botched diamond heist involving two car accidents, Richie is given one final opportunity to clear his debt. He travels to
Moscow to steal a priceless antique cross from a
penthouse apartment. Richie and his two Russian accomplices, Peter and Yuri, successfully retrieve the cross, but their escape is foiled when the elevator becomes stuck on the unfinished 13th floor. Believing they are trapped by the police, they take the other passengers hostage to negotiate their way out. However, when the elevator reaches the ground floor, one of the hostages is found beheaded, signaling that something far more sinister is at play. As the group begins to unravel, the hostages split into two factions. Sonya, Helena, and Katerina form a
Christian sect, joined by Yuri, while the others—Dmitry, Anna, and security guard Boris—form a second group. Chaos ensues when the Christian group seizes firearms, injuring Peter, and Sonya takes Yuri to a secret chamber where a wild, armored man named Alex awaits to sacrifice him. Though Yuri escapes, he is killed by one of Alex's elaborate traps, accompanied by
disco music and flashing lights. In the ensuing melee, Katerina is killed, allowing Richie and the remaining hostages to flee. Richie and the survivors discover Alex's lair, complete with
security cameras monitoring their every move. They learn that Alex is Sonya's twin brother, and both believe they are descendants of
Ivan the Terrible. Richie and Anna decide to pursue Alex, while Boris and Dmitry attempt to set traps for him. However, their traps fail miserably, and Alex begins hunting them down. Dmitry is easily caught, and Boris is tricked into deploying a faulty trap, resulting in the loss of his hand. Despite cauterizing the wound, Boris is further incapacitated by a serum injected into him, restricting his facial movements. Meanwhile, Alex retrieves the cross and prepares to sacrifice Peter, who miraculously survived his injuries. In a final confrontation, Richie, Boris, and Peter all attack Alex. Though Alex easily kills Peter, Richie manages to impale Alex on his own disco spikes and sets him on fire, recovering the cross in the process. As they attempt to leave, Sonya tries to strangle Richie, but Anna stabs her with a
nail file, saving Richie's life. Outside, Richie and Anna are greeted by Groznyi, who rewards Richie handsomely for the job. However, Richie, now enraged by the revelation that Groznyi is Sonya and Alex's brother, vows never to work for him again. Groznyi ominously suggests that Richie will return, but Richie and Anna depart for
Los Angeles, leaving the chaos behind. ==Cast==