She lifted up her granddaughter from the cot, clutched her to her chest and, without looking at her beautiful daughter lying dead on the floor of her bedroom, ran from the house.

She lifted up her granddaughter from the cot, clutched her to her chest and, without looking at her beautiful daughter lying dead on the floor of her bedroom, ran from the house.

Only when she was outside did she let a wail escape her lips, frightening the baby who joined in her screams.

When Isabel Gallagher is found murdered on the floor of her baby's nursery by her mother, it's a gruelling case for Detective Lottie Parker. Isabel's pyjamas have been ripped, her throat cut and an old-fashioned razor blade placed in her hand.

As Lottie looks at the round blue eyes and perfect chubby cheeks of Isabel's baby daughter, she can't understand who would want to hurt this innocent family.