The Danger Mark.

Scott Seagrave and his sister Geraldine are left the family estate when their wealthy alcoholic father dies. Unfortunately, they've also inherited his problems with alcohol, so they stay at the estate in seclusion. When Geraldine reaches "coming-out" age, Scott throws her a coming-out party. However, one of the men after her hand in marriage, Jack Dysart, tricks her into taking a drink, and she winds up embarrassing and humiliating herself in front of an old family friend, Duane Mallett, whose daughter Sylvia is in love with Jack, even though he's treated her shabbily.