When Scully and Doggett are contacted by a man who claims his wife was murdered shortly after giving birth to an alien baby, Scully digs deeper into reports of alien fertilization on humans and begins to question her own pregnancy and its conception.

Shortly after Mulder is buried, Billy Miles is found very dead but somehow comes back to life. Skinner and Scully put all their hopes into digging up Mulder and discovering that he too, is still alive. As Mulder lies in hospital without indication that he is going to fully recover, Krycek comes to Skinner and offers him a vaccine to the virus that has infected Mulder - but the cost of the vaccine is that Skinner has to kill Scully's unborn child.