Princeton grad student Richie (Justin Timberlake), believing he's been swindled, travels to Costa Rica to confront online gambling tycoon Ivan Block (Ben Affleck). Richie is seduced by Block's promise of immense wealth, until he learns the disturbing truth about his benefactor. When Richie is coerced by the FBI to help bring down Block, he faces his biggest gamble ever -- outmaneuvering the two forces closing in on him.