Echo is a magical and heartwarming book about a story of Friedrich in Germany, Mike in Pennsylvania, and Ivy in California. Each have a turn to play an enchanted harmonica, which solves a puzzling quest of a Prophecy, a Promise, and a Harmonica.
Even before the Harmonica ever reached the children, Otto the Messenger meets the three lost sister—Eins, Zwei, and Drei who were banished into the woods where the sun sets, and rises, but time never passes. To free the sisters, a harmonica travels from hand to hand, passed first by Otto when the time is right. By doing so, this unlocks a curse that is set upon the sisters: "A Messenger brought you about. One-and-the-same must bring you out. You may not leave in earthly form. Your spirits to a woodwind born. YOU save a soul from Death's dark door, or here you'll languish, evermore."
Decades later during WW2, Friedrich finds the Harmonica which brings light in his life and goes on a dangerous journey to rescue his father. The Harmonica then travels into Mike's hands as he does his best to keep his brother with him. Finally, the Harmonica lands in California where Ivy tries to hold her family together.
The Harmonica sparks hope for each child, and frees the three lost sisters, led by a Prophecy. "Your Fate is not yet sealed. Even in the darkest night, a Star will shine, a Bell will chime, a Path will be revealed."
Friedrich, Mike, and Ivy comes together in a unified orchestra where they lie under the same stars, connected by the same silken thread of destiny, with their own suspenseful stories that converges into an orchestral crescendo.