Herman owes a lot of gambling debts. To pay them off, he promises the mob he'll fix a horse, so that it does not run. He intends to trick his animal-loving cousin Virgil, an apprentice veterinarian, into helping him. Of course, he doesn't tell Virgil what he is really up to. Mistaken identities are assumed, while along the way, Virgil meets a female vet and Herman falls for the owner of the horse.
Dean Martin
as Herman Nelson
Jerry Lewis
as Virgil Yokum
Marjie Millar
as Phyllis Leigh
Pat Crowley
as Autumn Claypool
Richard Haydn
as Bertie Searles
Robert Strauss
as Seldom Seen Kid
Gerald Mohr
as Marshall Preston
Sheldon Leonard
as Jumbo Schneider
Romo Vincent
as Poojah
Jack Kruschen
as Short Boy
Frank Nelson
as Radio Exercise Instructor (voice) (uncredited)
Dick Gordon
as Hunt Club Ball Guest (uncredited)
