A thirteen-year-old boy holds the fate of his family, his neighborhood, and the world in his hands when he discovers that his cat is from a secret realm of warrior cats facing a dangerous enemy.

The walls between worlds are wearing thin. On one side is the bustling neighborhood of San Antonio—home to thirteen-year-old Tito Rodríguez.On the other is a mythical realm where forces of darkness are looking for a way out. Standing between worlds are the guardians of humankind—a race of fierce warrior cats, who appear in our world as cute and furry companions.

When Tito follows a stray cat through a hidden portal, he finds himself at the center of this cosmic battle between the warrior cats and evil spirits that feed on negative emotions. And according to an ancient prophecy, Tito is the Chosen One who will lead the fight against the forces of darkness . . . probably.

It turns out that there are three possible Chosen Ones—Tito and his new friends and fellow outsiders Luisito and Isa, who have their own furry sidekicks (or wise mentors, if you ask the cats). And with the darkness slipping through the cracks to the human world, all three will have to train for the ultimate fight and prove who is the true hero.