Blake Edwards directed this big-screen adaptation of the once-popular TV detective series Peter Gunn, which Edwards helped create. Peter Gunn (Craig Stevens) is a tough but polished private eye who fights crime with the help of friendly advice from an inside source at the police department, Lt. Jacoby (Edward Asner), no-nonsense nightclub owner Mother (Helen Traubel), and Gunn's best girl, Edie (Laura Devon). When a top crime boss is assassinated, Gunn is called in to investigate. Fusco (Albert Paulson) is a mobster poised to take over the city's criminal empire, and Daisy Jane (Marion Marshall) is a madame who thinks that Fusco pulled the trigger to further his own career. Jane wants Gunn to dig up the truth about Fusco, though Daisy Jane turns out to be the one with the biggest secret of all. Gunn retains Henry Mancini's memorable theme music from the original show, and brought back Craig Stevens, who played Peter Gunn on the original TV series, though Herschel Bernardi and Lola Albright were replaced as (respectively) Jacoby and Edie.