Elizabeth, Joyce, Ron and Ibrahim --- the Thursday Murder Club --- are still riding high off their recent real-life murder case and are looking forward to a bit of peace and quiet at Cooper’s Chase, their posh retirement village. But they are out of luck. An unexpected visitor --- an old pal of Elizabeth’s (or perhaps more than just a pal?) --- arrives, desperate for her help. He has been accused of stealing diamonds worth millions from the wrong men, and he’s seriously on the lam. Then, as night follows day, the first body is found. But not the last. Elizabeth, Joyce, Ron and Ibrahim are up against a ruthless murderer who wouldn’t bat an eyelid at knocking off four septuagenarians. Can our four friends catch the killer before the killer catches them?

In a peaceful retirement village, four unlikely friends meet weekly in the Jigsaw Room to discuss unsolved crimes. Together they call themselves The Thursday Murder Club. When a local developer is found dead with a mysterious photograph left next to the body, the Thursday Murder Club suddenly find themselves in the middle of their first live case. As the bodies begin to pile up, can our unorthodox but brilliant gang catch the killer before it's too late?