Carrie Mathison, a CIA operations officer, is on probation after the implementation of an unauthorised transaction in Iraq. As a result, she has been redeployed to the city's Counter terrorism. While in Iraq, she was warned that an american prisoner had been turned by Al-Qaeda. When Nicholas Brody, a U.S. Marine Sergeant, is rescued after being held hostage since 2003, and suspect she that he is. While Brody is received home as a war hero, Carrie goes to any lengths necessary to catch him.