Gwenni Morgan is not like any other girl in this small Welsh town. Inquisitive, bookish and full of spirit, she can fly in her sleep and loves playing detective. So when a neighbour mysteriously vanishes, and no one seems to be asking the right questions, Gwenni decides to conduct her own investigation. She records everything she sees and hears: but are her deductions correct? What is the real truth? And what will be the consequences of finding out, for Gwenni, her family and her community?