Ever since Pippa and her beloved horse, Zephyr, returned from the slopes of Mount Olympus, they’ve tried to adjust to living a normal life on the ground. But when Pippa finds Tazo, a lost winged colt, she knows she has to get him to the land of the gods before it’s too late—even though Zeus himself banished her from Mount Olympus after she lost the Winged Horse Race. But Mount Olympus is at war. The winged horses have been kidnapped, most of the gods have been imprisoned, and vicious half-horse, half-sea monsters roam the mountain. Only Zeus remains, but the king of gods is powerless without his winged horses by his side. In order to save Mount Olympus and the human realm, Zeus charges Pippa and Hero with training Tazo—the last remaining winged horse. But first, they have to find their way to the fire stables, hidden deep inside the underworld where no mortal belongs. There, Pippa and Tazo can learn from the best winged horse trainer in Olympus—a woman who might finally have answers about Pippa’s mysterious past.