"Lately Nizhoni has been able to detect monsters, like Mr. Charles, her dad's new boss at the oil and gas company. He's also alarmingly interested in Nizhoni and her brother, Mac, their Navajo heritage, and the legend of the Hero Twins. Nizhoni knows he's a threat, but her father won't believe her. When Dad disappears the next day, leaving behind a message that says 'Run!', the siblings and Nizhoni's best friend, Davery, are thrust into a rescue mission...

Relates the tale in which Monster Slayer and Born for Water, the twin sons of Changing Woman, seek out their father, the Sun, so that they can fight the monsters that threaten the world.