Wealthy businessman Jack Robinson (Matthew Modine) is building a new casino on the site of the family castle in England when the construction crew makes a startling discovery: They find the skeleton of a gigantic human being. Soon, foul weather and natural disasters occur at an unnatural rate. Countess Wilhelmina (Vanessa Redgrave) tells Jack that he's related to young Jack (J.J. Feild) who, 400 years ago, climbed a vine into the sky and came back with a goose that lays golden eggs and a harp that can play itself. Disbelieving, Jack encounters the lovely Ondine (Mia Sara), a mysterious woman who says she's 10,000 years old and that the evil weather can be stopped -- in fact, the world can be saved -- if Jack goes to the land in the sky with her to stand trial for his ancestor.