Welcome! The lobby of the Deranged L.A. Crimes theater is open! Grab a bucket of popcorn, some Milk Duds and a Coke and find a seat. Tonight’s feature is THE HAT BOX MYSTERY starring Tom Neal, Pamela Blake, Allen Jenkins and Virginia Sale. Enjoy the movie!
In New York City, society matron Marie Moreland’s life is threatened by a blackmailer named Stevens. Meanwhile, at the Ashton Detective Agency, Russ Ashton, his secretary and fiancée, Susie Hart, and his assistant, Harvard, wait for clients while filling up on hamburgers from Harvard’s girl friend, Veronica Hooper, who runs a diner. When Russ is called away to Washington, D.C. to act as a bodyguard, Harvard borrows money from Veronica to pay for Russ’s trip. Left in charge, Susie accepts a case from Stevens, who is in disguise. Stevens claims he needs evidence to sue his wife for divorce, and gives Susie a hat box equipped with a camera.