A Catholic father-of-four is arrested after a prostitute is found murdered, but he denies the crime.

Beck returns from sick leave to work alongside Penhaligon, who is privately convinced that Beck raped her but has no forensic evidence.

While Fitz faces a family tragedy, a second prostitute is attacked while the chief suspect is still in custody.

An identical murder takes place while David Harvey is in custody.

Fitz visits his priest brother Michael and accuses him of murder, while Maggie Harvey demands that her husband is released.

After another prostitute is slain, Fitz comes to believe that David Harvey's wife Maggie is the killer, in spite of vehement protesting by the police and his brother, Father Michael.