Billy Crocker falls in love with Hope Harcourt on a ship to London. However, Hope is engaged to Sir Evelyn Oakleigh. Billy stows away on the ship hoping to win Hope's heart. Gangsters Moonface Martin and Bonnie are also aboard in disguise. Moonface helps Billy disguise himself and avoid capture. Throughout the journey, Billy tries different schemes to separate Hope from Evelyn so she can be with Billy instead. After many comedic mishaps, Billy is ultimately successful and marries Hope.