A little girl appears in Central Park: red-haired, blue-eyed, smiling, perfect-except for the blood on her shoulder. It fell from the sky, she said, while she was looking for her uncle, who turned into a tree. Poor child, people thought. And then they found the body in the tree. For Mallory, newly returned to the Special Crimes Unit after three months' lost time, there is something about the girl that she understands.