A tenant has disappeared in a New York slum, leaving behind strange, original artwork. Gallery owner Ethan Muller can see its brilliance—and money-making potential. When Ethan displays the art, the show attracts the attention of the police. Because the subjects of the pictures look exactly like the victims in a long-cold murder case. Ethan has received a letter saying stop, stop, stop. And the still-missing genius may be the link to a madman—or the madman himself....