Brother Bart Maverick arrives in New Orleans to team with Bret and board a riverboat's maiden voyage, sold out to Creole aristocrats with gambling fever. To crash the private cruise, the Mavericks introduce themselves to the ship's French owner, whose lovely daughter, Yvette, is shanghaied right after the Mavericks are rebuffed. The brothers pursue the kidnappers, hoping to free the jeune fille, get an invitation, and a reward. At the New Orleans cabaret where the Mavericks meet Yvette, there is also a performer named Jody Collins, and from there they find themselves in big trouble.
—David Stevens