Lucy’s parents have separated, and she is off to London to visit her mother and her new family. She is fortunate to be able to fly: the world is in the grip of perpetual rain, and travel is restricted. Some inhabitants have become amphibians; others live in government camps. But Lucy’s fate is rather more intriguing. A cloud boy (seen only by Lucy) appears outside the plane window before being snatched away by a ghoulish cloud creature. As they wait in the rain at a bus stop in London, Lucy and a boy called Daniel are whisked up to Cloudland by a peculiar woman called January. There it is the task of Lucy, Daniel and assorted Cloudlanders to rid the heavens of the evil Kazia and thus stop the rain on Earth and prevent the onset of an ice age – an interesting premise.