Each year, high up in the snowy mountains of Switzerland, the villagers of Dorta bang their drums, blow their horns and make a noisy ruckus to keep the fearsome Mountain Dragon away.

But this year is different. One cold winter morning Mimi discovers something extraordinary, a baby dragon asleep in the woodshed! The little creature is lost and frightened. But how did he get there and what happens if his mother comes looking for him? Mimi must be extremely brave if she is going to reach the Dragon’s castle at the very top of the mountain and return the baby dragon safely home.