In a small town, three mothers wave goodbye to their children at the school gates.

Naomi has lived in Exton Cross since she was born, and she knows everything there is to know about everyone.

Aleema hates it here. It’s been three years and she’s yet to make a single friend. And she’s sure the other mums whisper about her behind her back.

Kelly is an outsider. New to the town, she arrives with nothing but her son – and a dark secret.

By the end of the school day, one of their children will be missing. And rumours will swirl that one of them knows why…