Marcia says there are wondrous things in Belgrandia - houses like palaces and enormous chandeliers and flying cats and music like nothing you've ever heard. But is it a real place or is she just a bit crazy? Her best friend Lewis isn't sure, but over four extraordinary days in their quiet seaside town, the evidence begins to build. And on that last breathtaking night, their belief in Belgrandia becomes one of life or death. A magical and compelling story from an award-winning children's fantasy author.