The film tells the story of the man in the center of most notorious scandal of the twentieth century, the Watergate scandal, that led to the premature resignation of the President Richard Nixon. The name of the man, who gave the secret information about the president to the press, had been a secret for a long time. It was revealed to publicity only 30 years after his confession. The shocking story is based on real events about the life of the brilliant and uncompromising Associate Director of the FBI, Mark Felt, who sacrificed his family, career and freedom for the truth.