On their way to a ball, eighteen-year-old Lady Margaret is reminded by her affectionate brother, the Earl of Saunton, to consider her choice of words before she speaks. Despite his warning, she voices her controversial opinion to Lady Sefton, one of Almack's lady patronesses, who can advance or ruin a debutante's reputation. Horrified by her thoughtless indiscretion, Margaret runs from the ballroom into the reception hall where she nearly slips onto the marble floor. Baron Rochedale, a notorious rake catches her in his arms to prevent her fall. Margaret, whose family expect her to make a splendid marriage, and enigmatic Rochedale, who never reveals his secrets, are immediately attracted to each other, but Rochedale never makes advances to unmarried females. When Margaret runs out into the street, out of chivalry it seems he must follow the runaway instead of joining his mistress in the ballroom, where anxious mothers would warn their daughters to avoid him. Rochedale's quixotic impulse leads to complications which force him to question his selfish way of life.