After two disastrous affairs with married women Lanny marries in the end a rich heiress from New York, Irma. In the climax Lanny covers his father's stock market margin call on Black Thursday, Oct 24th 1929, then insists that his father sell all his stocks the next market day, thus escaping the carnage of Black Tuesday. His efforts to save his wife's wealth were not quite as successful, and her uncle was wiped out.