Fleming Stone Mystery #8 is a courtroom drama centering on the slaying of a Bronx businessman whose body is discovered in a remote corner of Van Cortlandt Park. The dead man's last words were "Cain killed me," which leads investigators to the victim's nephew Kane Landon. But was 'Cain' a Biblical reference? Or did it mean something else entirely? Landon has no credible alibi and finds himself on trial. With circumstantial evidence against him, Landon turns to expert detective Fleming Stone and his assistant Fibsy to unravel the meaning of ... The Mark of Cain.