This ancient history musical comedy predates A Funny Thing Happened on the Way to the Forum by a few decades. Frank Albertson plays a happy Roman bachelor who falls for a lovely slave girl, in a silly tale that uses stock footage from MGM's silent Ben Hur.
Oswald the Rabbit and his little brother catch the Slumberland Express and it carries the assorted animals to childhood's dream of paradise - an amusement park where all the games are free, and windows are provided just to be broken by an abundant supply of free rocks, and old men wear silk hats to provide targets for snowballs.
Someone is murdering the cast and crew of a new Hollywood movie, and the leading lady may be next. As a police detective locks down the lot and refuses to let anyone leave, the studio’s publicity head and his secretary attempt to solve the murders themselves.