When a young nanny is found dead, new mom Tash is intrigued. She has been searching for a story to launch her career as a freelance journalist. But she has also been searching for new friends to help her navigate motherhood. She sees them at her son's playgroup. The other mothers. A group of sleek women who live in stunning houses. When the mothers welcome her into their circle, Tash is quickly swept up into their world. But when another young woman is found dead, Tash is led uncomfortably close to the other mothers. Are these women really her friends? Or is there another reason why she has been accepted into their exclusive world? Who, exactly, is investigating who?