Fox Mulder (David Duchovny), Dana Scully (Gillian Anderson), Walter Skinner (Mitch Pileggi), and several other FBI agents hide in a Washington park to catch Jacob Haley (Daniel von Bargen), the second-in-command of an anti-government militia called the New Spartans. As Mulder and the other agents slowly secretly corner Haley, Haley hands an envelope to another man (Armin Moattar) before running off. Mulder gives chase, but Haley somehow evades capture. The agents then discover that the flesh of the man who was handed the envelope has been eaten away by an unknown toxin.