FBI Assistant Director Walter Skinner is the prime suspect in a homicide involving a woman he was with the night of her death. Mulder and Scully are all he has to prove his innocence, as superior officers try to shut him down and the only clue is a mysterious old woman.A furious pursuit of Agent Mulder is underway, and more importantly, the government wants the data tape he carried. Agent Scully, against all odds, searches to uncover his whereabouts, persisting that he is alive when all others deny it.