Lost and alone in a forbidden forest, a young boy named Otto meets three mysterious sisters and suddenly finds himself swept into a puzzling quest involving a prophecy, a promise, and a magical harmonica. Decades later, this very same harmonica travels across time and continents, landing in the lives of three different children facing their own daunting challenges. In Germany, Friedrich must rescue his father from a dangerous regime. In Pennsylvania, Mike fights to protect his younger brother and keep their family together. And in California, Ivy struggles to find her place in a new community while facing prejudice. As you follow each child's suspenseful solo story, you will discover how they are all pulled by the invisible thread of destiny. Richly imagined and masterfully crafted, this uplifting novel pushes the boundaries of storytelling to create a wholly original adventure. You will be captivated as their separate journeys converge in a beautiful, musical crescendo that will resound in your heart long after the final page.