Gideon has the chance to ride the skies with his grandfather for the last time on the semi-sentient airship, Betty-Lou. All three discover more than they bargained for as they retrace their history starting with the floating island where it all began. A terrible storm of intrigue, betrayal, and greed awaits them on their journey and challenges the seasoned sailor and his grandson to their limits of resourcefulness and endurance. Gideon and his grandfather brave the elements and battle fierce enemies to discover the truth about who Gideon really is.