SYNOPSIS:
NYPD Inspector Edward X. Delaney is nearing retirement age, and he's been beaten down by his job, and his life. On the streets of New York, a brutal serial killer is on the loose with a mysterious and distinctive weapon, but nobody else on the force sees a pattern; in a local hospital, Delaney's wife Barbara (Faye Dunaway) lies dying of kidney disease. Between visits to the hospital, Delaney - an old-fashioned anachronism on the NYPD - immerses himself in one final case. For Sinatra, The First Deadly Sin was the last film he'd produce, and the last one in which he'd star.