Eric O’Neill (Ryan Phillippe) has just landed a dream job as a full-fledged FBI agent and has been handpicked to work under renowned operative Robert Hanssen (Chris Cooper) within a new division created to protect all classified FBI intelligence. In actuality, he is working under Special Agent Kate Burroughs and Special Agent Dan Plesac, who have been investigating Hanssen as a potential mole for the Soviet Union. Their case is of grave importance given the type of information he has access to. O’Neil must gain his new mentor’s trust in hopes that the traitor will eventually expose himself. Soon, O’Neil is risking his life as well as the life of his family as he and Hanssen become tangled in a dangerous game that pits them against one another.