Andy Barber's job is to put killers behind bars. So when a boy from his son Jacob's school is found stabbed to death, Andy is doubly determined to find and prosecute the perpetrator. Until a crucial piece of evidence turns up linking Jacob to the murder. In the face of every parent's worst nightmare, Andy and his wife Laurie will do anything to defend their child. Because, deep down, they know him better than anyone. Don't they?