When Pippa's best friend goes missing on a school run, no one thinks twice. Heather is pretty, popular and more than a little wild.

Most people think she ran away for the attention... Others say girls like her always get what's coming to them.

Pippa's mother, Abbie, has never liked Heather. Or her mother Michelle, a successful doctor who thinks she's too good for the school mums' group.

But when Heather turns up dead, everything changes. Because Pippa was the last person to see her alive... and now Abbie's own house of cards is about to come tumbling down.