K9 Handler Joe Griffin, was at Ground Zero the day the Towers fell. Even after nearly twenty years, that day still haunts him. He might have left the NYPD far behind when he took a position as an instructor and team member for Disaster City Search and Rescue Academy, but five more years of intense search and rescue has left him feeling like he needs a change. So when he meets a rescue agent from the Wild Animal Protection Agency, he decides the offered position to help rescue wild horses in the remote parts of America is exactly what he and his K9 partner, Legend, need.