Mulder and Scully once again find themselves caught up in a possible conspiracy involving the FBI. In self-defence Mulder kills a man who was spying on him in his apartment. Scully tells the FBI that the dead man in Mulder's apartment is Mulder. Mulder uses the opportunity and the dead man's ID to infiltrate the Department of Defense and search for answers about Scully's cancer. Scully also continues to look for answers about her cancer and the spying done on Mulder. Is it love that drives him towards a cure for Scully or a desire to uncover the truth?