When Dilly arrives on the island of Ollipest, she is unsure what to expect from her new life. She certainly doesn't expect to find magic! Until now, the magic of Ollipest Island has been a well-kept secret. Then the Museum of Lost Umbrellas opens after many years of closure. And when the museum attracts some unsavoury anti-magic outsiders, Dilly must unlock her ancestral powers to help keep the island safe.