Paris plumber Elmer Tuttle is enlisted by socialite Patricia Alden to help make her lover Tony Lagorce jealous. With the help of his friend Julius J. McCracken and through the high society contacts he has made through Patricia, Elmer hopes to find financing for his latest invention, a pistol with a range-finding light. Comic complications ensue when Elmer's effort to interest a military leader is misconstrued as an assassination attempt.

Jimmy Durante is jungle movie star Schnarzan the Conqueror, but the public is tiring of his fake lions. When Baron Munchausen comes to town with real man-eating lions, Durante throws him a big Hollywood star-studded party so that he might use the lions in his next movie. But, his film rival sneaks into the party to buy the lions before Durante.