A strange man and woman turn up on the doorstep of Kyle Heath, an eleven-year-old local school boy, claiming to be social workers having received a report of abuse against the child. As they make the decision to take the child from his mother's custody, little does she know that the man and the woman are infact sinister child abductors, who have no connection to social services whatsoever. A search for the missing boy soon gets underway, but the discovery of a large quantity of drugs underneath the floorboards of his living room reveals some rather dark and sinister secrets. DI Morton suspects that the child's abduction, however, was planned by his own mother to extort money. The boy's headteacher soon becomes prime suspect when evidence reveals he was with the boy the night after he disappeared. Meanwhile, Banks' attempt to protect Annie from the emotions of the case draw them closer together.