Eric O'Neill, a computer specialist, is assigned to clerk for Robert Hanssen, a senior FBI agent with 25 years of experience, to investigate his sexual habits. However, O'Neill soon grows to respect Hanssen, a devout Catholic, as they work together, despite his wife's resentment towards Hanssen's intrusiveness. The stakes escalate as O'Neill tries to help catch Hanssen, who is revealed to be a spy, and navigate his personal life.

Breach
A veteran FBI agent accused of espionage engages in a cat-and-mouse game with his young and ambitious boss, leading to a thrilling showdown.