Tommy Anderson was born in a prison, and he died in one too. The last moments of his life are recorded on CCTV, and yet no one can answer the simple question: whose fault was it? His mother Anne blames Marcus, the guard who was supposed to be looking after him. Marcus, acquitted by the courts but tormented by his part in Tommy's death, wants the family's social worker to admit to the role she played. And social worker Sue can't work out when it was she stopped caring.

Piecing together a boy's life and death in care, Carthageasks who should raise our children when the systems designed to protect them can be as abusive as the situations from which they were rescued.