In a drunken gambling loss, Lord Markham promises his sister Lady Augusta to the Duke of Yorkton, a man of vast wealth, who can pay off the family's gambling debts. Lord Howe, the Duke’s younger brother, has met Lady Augusta several times, and their attraction is mutual. He begs the Duke to forget Lady Augusta, but the Duke, a heartless rake, refuses. He plans to use Lady Augusta for his selfish pleasures. Can Lord Howe rescue the woman he loves before she falls victim to his rake brother?