Tom is dangerously close to discovering where his threshold is-the point of no return for his sanity. His encounter with the killer represents one more bizarre hot potato he's forced to juggle instead of filing away neatly. It's not one too many, but what if the next one is? And could all the coincidences that keep happening to Tom be nothing more than that? Could a young woman named Zig-Zag really be an angel? How could a dog lead Tom to one of the most important clues? The questions pile up, much as the murders do.