Based on the book "Bringing Down the House", the film centers around an MIT student (Jim Sturgess), desperate for money, who joins an illegal card-counting group led by Kevin Spacey. As the casino's security closes in on the scam, he faces a moral dilemma.
In the movie "21" a group of extremely intelligent MIT students are recruited by a teacher of black jack and how to win at the biggest casinos in Vegas. The lead character finds himself involved with others that are on path to achieve the same goal - win a lot of money. This is the true story of real black jack players.