Tabby’s fed up. Fed up with losing her best friend and fed up that Grandad has come to stay. Grandad’s always telling the same old silly, made-up stories. And now Tabby has to walk his smelly dog Buster every day after school. But one of Tabby’s walks takes her to a lonely hilltop house where she spots something strange going on. So strange she can’t help but mention it to Grandad. He tells her yet another fantastical story, and it’s only when tragedy strikes that Tabby wonders…could Grandad’s impossible tale be true?