Friends and family are split as longtime allies turn on each other, and born foes form unlikely bonds. The very threat that led Bramble to leave the place he called home has ensnared the creatures who live on the mountain. As the mysterious poison begins to affect more and more animals, Chase struggles to determine where her loyalties should lie. And down on the plains, Prance prays that the Great Spirit will send Thorn a solution to the shadowy menace. But even the Great Father may not be able to save them this time.