Star, Marco, and Pony Head are about to have a Friendship Thursday by curling up under a blanket on the sofa and watching a television show. Pony Head finds the concept boring and tags along with Marco to pick up a pizza from Emilio's shop. But problems arise when Pony Head gets distracted with buying some skinny jeans, inadvertently confuses a taxi ride with a carjacking, and when Marco makes a casual remark about Emilio's pizza that Emilio takes to heart.
After having skirmished with a number of dangerous monsters, Star Butterfly arrives on Earth to live with the Diaz family. However, rather than living a normal life, Star continues on having to battle villains both throughout the universe and in their high school, although if only to protect her extremely powerful wand, an object which she is still confused with.