Nine-year-old Phoebe Howell and her magical unicorn friend, Marigold Heavenly Nostrils, explore the complexities of popularity, friendship, and crushes. Phoebe finds herself in the awkward position of taking on her friend Max in a debate contest and also helping her best frenemy, Dakota, regain her confidence. Marigold goes to therapy and reconnects with a friend named Sparkleface McGee who she hasn't seen in 700 years. And both Phoebe and Marigold draw a fun series of comics about their lives. As it turns out, the social lives of a nine-year-old human and a centuries-old unicorn have a lot in common!