Paris, 1891. Laura is living on the streets, far from the American Prairies where she was born. When rescued by the entrancing aerialists, Ena and Auguste Gaudron, she soon finds herself ensconced in the family hot air balloon business, and offered the chance to learn how to fly.

Cardiff, 1896. The Gaudrons accept an invitation to be part of the Cardiff Fine Art, Industrial and Maritime Exhibition, presenting a daring show of balloon ascents and parachute descents.

Then late one night, a young girl, Grace, knocks on the Gaudrons' door. She is desperate to fly, whatever the cost.As Grace's dreams begin to take wing, can Laura be the one to keep her grounded? Or will both girls risk it all for one dazzling moment of flight?