The suspicious deaths of two elderly neighbors draw attention to a charming young churchwarden. When investigators uncover his attempts to use romance and religion to seduce them into signing over their estates, a race begins to discover whether he is a killer.

When the murder of a young woman points police to a quiet church handyman, detectives uncover a serial killer hidden in plain sight for decades, linked to multiple killings across the U.K.

The British Royal Family is linked to scandal when a former aide goes on the run after her boyfriend is murdered. When police find her, she makes explosive allegations of abuse by him. Police delve into the couple's secrets to ask if she murdered in cold blood?