Ellis, a 15-year-old boy, lives in Tucson, Arizona, with his mother Wendy, who's a free-spirited and New Age-believing single parent. His home life is far from conventional, with a part of his upbringing being significantly influenced by Goat Man, a bearded and long-haired gardener who lives on their property in a tent and takes care of goats. Goat Man is more than just a gardener to Ellis; he's also a mentor and father figure, leading him on treks in the wilderness and initiating him into his peculiar lifestyle and philosophies. In this unusual household setup, Ellis finds solace and guidance in Goat Man’s eccentric yet stable presence amidst his mother's unpredictable behavior and array of boyfriends.

Feeling the need to break free from his unconventional home life and seeking a more traditional education, Ellis decides to leave Tucson to attend Gates Academy, an elite East Coast prep school. This decision marks the beginning of a journey not just geographically but emotionally, as Ellis starts navigating the complexities of this new environment, the expectations placed on him, and his own aspirations. Meanwhile, his departure forces Wendy to confront her own choices and her relationship with her son. As Ellis tries to adapt to the structure and rigor of his new life, the influence of Goat Man's teachings and the bond they share continues to impact him, highlighting the contrasts and similarities between his old and new worlds.