Billy Rose's Jumbo (1962)

Pop and Kitty Wonder are the owners of the Wonder Circus and because of Pop's addiction to gambling they are constantly in debt and the creditors are very close to foreclosing on them. Their main attraction is Jumbo, the elephant and it seems that their competitor, John Noble wants Jumbo and is luring away all of their acts leaving them with virtually nothing. Then all of a sudden a mysterious man named Sam Rawlins joins them as a wire walker and Kitty is taken with him, what they don't know is that he's Noble's son.