Samuel Bicke (Sean Penn) is a disillusioned salesman whose elaborate views of honesty and morality alienate him from society. He purposely turns away customers, steals from his brother and ruins relationships with his wife (Naomi Watts) and his best friend (Don Cheadle). As Samuel's life spins out of control, he pinpoints Richard Nixon as the man responsible for capitalism and plans to assassinate the president by crashing an airliner into the White House.