On a bright morning in the London suburbs, a family moves into the house they’ve just bought on Trinity Avenue. Nothing strange about that. Except it's your house. And you didn’t sell it.

When Fi Lawson arrives home to find strangers moving into her house, she is plunged into terror and confusion. She and her husband Bram have owned their home on Trinity Avenue for years and have no intention of selling. How can this other family possibly think the house is theirs? And why has Bram disappeared when she needs him most?

As the nightmare takes grip, both Bram and Fi try to make sense of the events that led to a devastating crime. What has he hidden from her – and what has she hidden from him? And will either survive the chilling truth – that there are far worse things you can lose than your house?.