A mother in mourningTwo years ago, Sarah's husband was jailed for her murder; her body was never found. Now, her mother, Claire, spends her sleepless nights running a helpline for vulnerable women.A woman with a secretClaire takes many calls, but one caller isn't like the rest. She isn't calling for help - she's calling because she claims to know what happened to Sarah.A killer on the looseBut when Claire hears the terrifying news that her daughter's killer has escaped from prison, she realises her nightmare is far from over - and her family are in danger yet again.