As a major airship port, Aerial City welcomes visitors from all over the world. Despite being surrounded by new inventions and colorful people, Malachi Covington partakes of little outside his books and studies. He aches for adventure and excitement but labors under the rules and expectations of his wealthy uncle. Five airships arrive in port, keeping his uncle busy and, as Malachi’s best friend Millie reminds him, they’re carrying parties full of crew members. Excitement finds him in the form of Ian, a charming airship pilot who invites him to tour his ship, the Mockingbird. With Ian at his side, Malachi discovers a world beyond his books and takes daring steps to become his own man.