For the past six months, something has been happening to young people in Santa Feliz. Week after week, there's news of another teen changing shape, transforming from human to wild animal and back again. The federal government has stepped in, asking affected youth to turn themselves in for "orientation and training."
Josh Saunders has seen the news reports, but he's still unprepared when it happens to him. One minute he's arguing with his mother's boyfriend and the next he's looming over the man, blood dripping from his claws—he has transformed into a mountain lion.
Trusting only his best friends Des and Marina with his secret, Josh tries to return to normal life. But when an accidental betrayal reveals Josh's secret, his carefully constructed cover is ripped apart, forcing his friends to intervene. They must grudgingly put their trust in outsiders, including other Wildlings—and, most challenging, in each other—if they ever hope to save him.