Some songs can change the world. His might save it.

When fourteen-year-old Xylo throws his sacred lute into the river, he doesn't just grow up—he starts a chain reaction that will shake the realms. Fleeing to New Eden, the realm of humans, ships, and music that pulses with impossible machines of the floating. Armed with nothing but his handmade lute, Xylo's chasing his dreams in the legendary city of Anchorion.

But the city holds darker secrets than street gangs and corrupt politicians. A powerful scarlet knight is using ancient spirits to bend the city to his will, and somehow Xylo's music is the only thing that can break his hold. With a mysterious girl from the realm of Light, Xylo must uncover the truth about his destiny before the realms are sealed forever.

Enter a world where songs can purify an evil mortal musician. But finding where you belong—even if it's exactly where you tried to run away from.