When Thomas Alva Edison asks for information, most feel compelled to give it. Not University of Washington Professor Benjamin Bradshaw. Not when the question concerns a device conceived in anger and harnessed for murder. Bradshaw hopes the mysterious invention remains lost in Elliott Bay, eluding the search of deep-sea divers. But when on a cold December morning in 1903 an electrician is found dead in the men's wear window of Seattle's Bon Marché clutching a festoon of Edison's holiday lights, Bradshaw suspects a dangerous game has been set in motion. Greed, passion, silence? Motives multiply as the dead man's secrets come to light. Bradshaw and his investigative partner Henry Pratt join Seattle Police Detective O'Brien to narrow suspects, but Bradshaw's intuition fails him. His heart is elsewhere, his attention distracted by the dilemma of loving a woman he cannot marry without defying his faith. With Christmas fast approaching, the pressure mounts, as does Bradshaw's dread that this will be his first unsolved case. With no other option, he does the unthinkable and prepares to face his greatest fears. Whatever the outcome, there will be no going back.