Less than two weeks after 3 year old Sammy Wray goes missing from a children's playground, a child's body is found in a sewer. DCI Lewis is leading the inquiry and the pathologist's report cites the cause of death as a blow to the skull. The investigation soon reveals that the boy's father, Clive Wray, is lying to them about his whereabouts the day the boy went missing. His ex-wife is known to have made threats against his new family and she becomes a suspect as well. The case is thrown into chaos however when DNA testing reveals that the dead boy isn't Sammy Wray. The police now have two cases to solve and it's back to square one interviewing Sammy parents, neighbors, workmen and any others who might have be in the area when Sammy disappeared. They're convinced his disappearance and the death of another child of the same age have to be connected but there is no apparent link.
—garykmcd