Martha is twelve - and very different from other kids, because of her parents.

Strict members of a religious group - the Brethren - their rules dominate Martha's life. And one rule is the most important of all: she must never ever invite anyone home.

If she does, their shameful secret - Abomination - could be revealed.

But as Martha makes her first real friend in Scott, a new boy at school, she begins to wonder.

Is she doing the right thing by helping to keep Abomination a secret? And just how far will her parents go to prevent the truth from being known?