Sam Windsor's parents and younger siblings, Grayson and Addie, are his whole world, so when his parents announce they're separating, Sam is devastated. He'd do anything to make his parents change their minds and keep the family together. When a stranger offers a flute made of bone that supposedly grants the player's wish, Sam doesn't really believe it will work but figures he has nothing to lose.

Surprisingly, the wish on the skeleton flute comes true. The next day, his parents are happily in love, with no plans for his dad to leave. But there's a major problem: his parents' relationship isn't the only thing in his life that has changed, and some of the changes are definitely for the worse.

Caught in a world full of unintended consequences and familiar strangers, Sam has limited options for returning to his old life--worries, challenges, and all. Can he track down the mysterious man who gave him the flute and undo his wish?