When Jacob fulfills a promise to his grandfather, Taw, and travels with him back to the Hopi reservation where he was born, he gets a lot more than a quiet trip to the desert. He quickly discovers that the Hopi on the reservation are divided over a lobo, a Mexican wolf, that people say is hunting on the reservation. There are some who want to kill the lobo, and others who are angry enough to kill anyone who gets in the way. The lobo is an endangered species, thought to have disappeared from New Mexico all together. Jake knows that if the lobo does exist, he must do everything in his power to help it. But time is running out!