Bark On follows triathlete Ezra Fogerty, who is training under the guidance of recently disgraced Olympic coach Benji Newton. They live on the barrier island of Kure, North Carolina, where a growing coyote population is displacing locals and tourists alike. Benji combats the coyotes and structures Ezra's training with a system of superstitions that Ezra finds dubious. When Benji invites teenaged orphan Casper Swayze to live and train with them, Ezra begins to question Benji's motives as well as his methods: does Benji see Ezra as a potential champion or a couch to crash on until he finds his next prodigy?