When Sydney Bonner overhears a fellow mah jongg player arguing on the phone with her husband, she realizes the couple's "perfect marriage" isn't all it appears to be. A few days later, the husband is found dead, his head bashed in. Fearing she'll be considered the most likely suspect, the widow prevails upon Sydney and her three friendsMarianne, Kat and Mickito find out who really killed him.
Though none of these four fun-loving, take-charge retirees has any training as detectives, the women agree to launch a secret investigation. As they dig under the happy veneer of their community's social life, they find more than enough suspects, from shady ladies to resentful golf buddies, to keep them looking over their shoulders.
Could the murderer be lurking among the talent in a chaotic production put on by Sydney's husband, who will do anything to keep busy in retirement? Could the sheriff, who may have more than a professional interest in chanteuse Kat, end up pinning the crime on the women instead? Each discovery during their investigations and their weekly mah jongg game keeps them running as they close in on the killerbut the killer may also be closing in on them.