In the next book in the thrilling fantasy series filled with gods and monsters of Shinto mythology, a twelve-year-old girl must steal an ancient relic, work with new friends and learn to control her own dangerous power to defeat a new threat. After vanquishing a demon king, saving her mom, and reconnecting with her friend Danny, Momo ought to be living the life she´s always wanted. But lately, Danny has been ditching her to hang out with mean-girl Ryleigh-and groups of kids have begun vanishing without a trace. Then a whole backyard full of cool kids at Ryleigh´s exclusive birthday party becomes the latest to disappear, leaving Momo, Ryleigh, Danny, boy band superstar Jin, and Momo´s old friend Niko the fox to fight a dangerous new enemy from Shinto legend. This time they are up against Tamamo-no-mae-beautiful, bloodthirsty, and manipulative, she´s the ultimate mean girl of the Kami-verse. To defeat her, Momo must travel to the Sky Kingdom and steal the legendary Mirror of the Sun. But if she´s going to survive monster ambushes, escape giant snakes, and pull off the heist of the millennium, Momo will have to find a way to work with her team (even Ryleigh), and grapple with the growing power that connects her with her storm god grandfather, Susano´o´, and her greatest foe-Izanami the Destroyer.