In England, railroad porter John Shand is offered an education by wealthy Alick Wylie, on the condition that he marry his benefactor's daughter, Maggie, within five years. John keeps his promise and is later elected to the House of Commons. Although he achieves fame through the wit and wisdom Maggie secretly adds to his speeches, John falls in love with Lady Sybil. Unaware of the infatuation, Maggie arranges for them to visit a country estate. John prepares a lackluster speech for a cabinet minister, but following a rewrite by Maggie, it is a success. He then becomes aware of her devotion to him, and how much he owes his position to her.