Stunned by the loss he decides to concentrate on his law school studies, and makes a promise to his girlfriend and fellow law student Jo (Gretchen Mol), to not play cards anymore.
Young hotshot poker player Mike McDermott (Matt Damon) loses his entire bankroll of $30,000 in a hand of Texas hold'em against Teddy 'KGB' (John Malkovich), a Russian Mobster, who runs an illegal underground poker room Mike frequents.