A shooting at Gretna Green. A bride is murdered on her wedding day, seconds after she slips on her new ring. It's brutal and bloody but she isn't the first victim and she won't be the last. With the body count now at 17, people are terrified, not knowing where the sniper will strike next. With the nation in a state of panic, the police are at a loss and turn to Washington Poe and Tilly Bradshaw - the only team who just might be able to track down a serial killer following no discernible pattern and with the whole country as his personal hunting ground. Can Poe and Tilly stop an unstoppable assassin, who never misses his mark and never makes a mistake? Or will he find them before they find him.