Maid's Night Out (1938) Joan Fontaine, Allan Lane, Hedda Hopper, Cecil Kell

Playboy Bill Norman wants to go on a six-month expedition to study tropical fish, but his wealthy businessman father wants him to buckle down and go to work. When Mr. Norman catches Bill trying to "borrow" his yacht, they make a wager. If Bill works for 30 days at the family dairy business without making a single mistake, Mr. Norman will finance his expedition.