The shocking murder lingered in the tabloids for weeks. A sweet elderly lady bludgeoned to death in a quiet corner of Cambridge by her eleven-year-old foster child, Daryll Flatt. Hideous as the crime was, the case was closed when the boy confessed to the murder. Now, two years later, Daryll's older brother hires private investigator Laura Principal to revisit the case - and to answer the baffling question - Why? On the surface, Daryll fit the mold of a child murderer perfectly - a hopeless boy, abused and cast off by a wretched family. Yet as Laura Principal probes deeper, several curious facts reveal themselves. And with each step closer to the truth, Laura senses someone in the corner of her eye, a threatening presence - standing in the shadows - watching her every move.