With business booming for Agatha Raisin Detective Agency, Agatha's in need of a well-earned break and with Christmas just around the corner it looks like the perfect opportunity to relax. However, when she receives a letter from an old lady begging for protection, Agatha can't help but spring into action.

Toni and Roy go looking for Ronnie, but someone else gets there first. After reinterviewing the victim's latest husband, Agatha learns about Chelsea's traumatic history and begins to make connections between the killings and the long-ago robbery. But can she unravel the puzzle before another life is lost?