"Ellie Quicke is shocked when her daughter, Diana, turns up at her door with suitcases in tow. Bunny Brewster has died of an overdose, and Diana's husband, Evan, is convinced that she is responsible for his friend's death. It seems that Diana and four other neglected, bored wives of Evan's friends recently joked about ways to kill their husbands. Diana's suggested method of murder involved muddling up pills--could this be how Bunny died, or was it...

Ellie's always disliked the local big estate agent--aka Great White Shark--so is distressed when her daughter Diana announces that she's carrying his child and about to become his fourth wife. But Ellie's soon drawn into the family circle when one of the Hooper children dies in their private gym and another succumbs to a peanut allergy.