2015 год. Micah Tuttle's Grandpa Ephraim has always told him wonderful stories about Circus Mirandus, a magical circus that he visited when he was a boy. But now Grandpa Ephraim is dying, and the terrible, grouchy Aunt Gertrudis has arrived to take care of Micah. All the magic of Micah's childhood seems lost until Grandpa Ephraim finally tells him the truth: Circus Mirandus is real, and the Lightbender, the Circus's greatest magician, owes Grandpa Ephraim a miracle. With his friend Jenny in tow, Micah sets out to find the Circus and the man he believes will save his grandfather. Micah does find the Circus, and it's more mysterious and fantastical than he could have imagined, but he also finds that the Lightbender doesn't want to keep his promise. And now it's up to Micah to get the miracle he came for.