A mystery writer becomes interested in a serial killer whose calling card is a Black Ace.
We start with a far-fetched meet-cute on a train, then the writer continues his investigations with a craggy old dude and his gentleman secretary. A couple of halfwit cops show up. (Chicago cops; NYC accents.)
Everyone flees to Louisiana. Settle in for a traditional spooky old house / cozy mystery.
They strive mightily for that elusive scary-jokey tone that was so popular, but alas:…