After nearly being killed by both a hired hit man and her former secretary, Agatha Raisin could use some low-key cases. So when Robert Smedley walks through the door, determined to prove that his wife is cheating, Raisin Investigations immediately offers to help. Trouble is, Agatha hates divorce cases - especially when she's been hired by Smedley - but she has a business to run now and she's not about to turn away a paying client. Unfortunately for Agatha, Mabel Smedley appears to be the perfect wife, young, pretty and a regular volunteer at church. But just as Agatha is ready to give up, Smedley is poisoned with weed killer, leaving Mabel, the prime suspect, to inherit a fortune. With no one left to pay her, Agatha decides to drop the case...that is until her old friend Sir Charles Fraith turns up again to rekindle her curiousity. Agatha is back, and irresistibly cranky as ever in her sixteenth adventure.