Maisie Traveller used to explore the world with her parents. She now lives in a small town house with Aunt Hetty, experiencing 'normal' life. But strangers start appearing, cryptic messages are left, and Aunt Hetty is kidnapped! Following a trail of clues that leads her to abandoned tin mines and a hunt for treasure, Maisie discovers that evil Dr Gallows and his gang have taken her family hostage and it's up to her to save them. Maisie is a positive heroine that all childen will relate to, especially those with autism.