Prominent criminal attorney Amos Strickland checks into the Lost Caverns Resort Hotel.

These former clients are Swami Talpur, Angela Gordon, Mrs. Hargreave, T. Hanley Brooks, Lawrence Crandall, Mrs. Grimsby and Mike Relia.

Angela tries to seduce him, but the police stop her when they fear she has poisoned the champagne, then the Swami attempts to hypnotize him into committing suicide but his stupidity saves him.

The bodies of Relia and the secretary Gregory Millford are found in Freddie's closet, and he and Casey try to move them and hide them.

Soon afterwards, several attempts to kill Freddie are made, including gunshots at the window of his booby-trapped room, and locking him in a steam cabinet.

Stone returns with some muddy shoes that belong to Melton, the hotel manager, which proves that he was the one in the caverns with Freddie.

[5] The role eventually played by Boris Karloff in the film was originally a female character named Madame Switzer in the final shooting script which was then titled, Abbott and Costello Meet the Killers.

[5] After filming was completed, Costello was bedridden for several months due to a relapse of rheumatic fever, which he originally battled in 1943.