The series is set in a world where humans and anthropomorphic animals live side by side, specifically focusing on the life of washed-up former sitcom star Bojack Horseman (Will Arnett) as he plans his big return to celebrity relevance with a tell-all biography that he dictates to his ghost-writer Diane (Allison Brie). Bojack also has to contend with the demands of his on-and-off girlfriend slash agent Princess Carolyn (Amy Sedaris), his slacker roommate Todd (Aaron Paul), and his oblivious former sitcom rival Mr. Peanut-Butter (Paul F. Tompkins).