It´s the following Thursday. Elizabeth has received a letter from an old colleague, a man with whom she has a long history. He´s made a big mistake, and he needs her help. His story involves stolen diamonds, a violent mobster, and a very real threat to his life. As bodies start piling up, Elizabeth enlists Joyce, Ibrahim and Ron in the hunt for a ruthless murderer. And if they find the diamonds too? Well, wouldn´t that be a bonus? But this time they are up against an enemy who wouldn´t bat an eyelid at knocking off four septuagenarians. Can the Thursday Murder Club find the killer (and the diamonds) before the killer finds them?