The transition from horses to automobiles at the turn of the century causes problems between a father and son.

Young Irish physician Peter Blood is exiled as a slave to Barbados, where he and his friend Jeremy are purchased by Colonel Bishop at the behest of his niece Arabella. With other slaves he captures a Spanish galleon and becomes the terror of the Caribbean privateers until offered a commission in the English Navy. He defeats the French at Port Royal, and as a reward he is named governor of Jamaica and marries Arabella.

Anna Moore, a poor orphaned country girl, and her little brother, Tommy, live with hypocritical Squire Simpson, who conspires with his son to acquire the inheritance due the girl.

Kingston Hollister admires Bernice Cleveland from afar. He asks Officer Callahan, the policeman on the beat, about her and mistakenly believes she is a lady's maid. So the wealthy Hollister disguises himself as the cop so he can meet her.