Gillian the giant is the youngest of a long line of BIG people. When she inherits land and properties, she finds that sometimes dealing with people who disagree with her is more trouble than what it's worth, so she packs up her belongings and moves to a mansion in the sky. To reach her, it's necessary to take a hot air balloon ride. Genevieve Gibson, a young girl who's curious about just who Gillian the giant is, makes an unexpected journey to find out just that.