Grace's best friend Anna is missing.

She would never leave her husband and son by choice and Grace is beside herself with worry.

As Grace searches desperately for answers, everyone seems to have a different version of the truth.

Why won't Anna's husband call the police?

What secrets are the other mothers at the school gate hiding?

With each day that passes, Anna's life is under increasing threat.

The pressure is mounting and it won't be long before something cracks...