Superintendent Le Page (Sharon Duce) returns with her report on Kersey's case, while Wycliffe and Lane work a strange manslaughter case in which the murderer claims she thought her victim was a ghost.
Fitz asks DCI Wise to replace him with Irene Jackson, as the killer may stop killing without his individual attention. Janice changes tack and lures Fitz's son to her flat, but when the police catch her, she is alone. With Mark Fitzgerald's life in jeopardy, Fitz must use all his powers of interrogation in finding his son before it's too late.
As Sandy conducts her review of the agency's spycraft, she and Jeanne continue to clash. When a potential asset contacts the CIA claiming to have vital information about a communications breach, Sandy has her doubts about the man known as GTPROLOGUE. Could this be part of a larger campaign by the Soviets to obfuscate the truth? Meanwhile, Ames learns that his request for a transfer to Rome has been approved.