"Are you my mummy?" Tessa Markham returns home to find a child in her kitchen. He thinks she’s his mother. But Tessa doesn’t have any children. Not anymore. She doesn’t know who the little boy is or how he got there. After contacting the police, Tessa is suspected of taking the mystery child. Her whole life is turned upside down. And then her husband reveals a secret of his own…. Tessa isn’t sure what to believe or who to trust. Because someone is lying. To find out who, she must confront her painful past. But is the truth more dangerous than Tessa realises?