1777: In the throes of the Revolutionary War, Landon Mansion is commandeered by British Lord "Butcher" Bedford. He stabs Lucy Tarleton--who spurned his king and his love--leaving her to die in her father's arms. NOW: After the day's final tour, docent Allison Leigh makes her rounds while locking up...and finds a colleague slumped over Bedford's desk, impaled on his own replica bayonet. Resident ghosts may be the stock-in-trade of stately Philadelphia...