Jack Dally lives in Windy Bottom with his mum Dotty, sister Dilly, and their milk-less cow, Pat. The village is terrorised by the wicked giant Blunderbore and his creepy sidekick Fleshcreep.

Greedy Mayor Donald Grump demands their overdue rent, and they struggle to keep their farm afloat. Dotty sends Jack to market to sell Pat, but he trades her for magic beans after meeting Fairy Sweet Pea. Dotty is furious – until a giant beanstalk sprouts overnight, leading Jack to a castle in the clouds.

Jack climbs the beanstalk to rescue Princess Jill, defeat the giant, and win the King’s reward. With golden eggs, a singing harp, and plenty of peril, Jack is in for a sky-high adventure.