'We're hungry,' his brother kept repeating. 'We're hungry, Justin. Please find us some food.' Justin was just five years old; his brothers two and three. Their mother, a heroin-addict, had left them hungry and alone, while she went to get her next fix. Later that day, after trying to burn down the family home, Justin was taken into care. Six years on, after 20 failed placements, Justin arrives at Casey's home. Casey and her husband Mike are specialist foster carers. They practice a new style of foster care that focuses on modifying the behaviour of profoundly damaged children. They are Justin's last hope, and it quickly becomes clear that they are facing a big challenge.