Star receives the royal magic wand but her parents panic and send her to Earth; Star's best friend from her home dimension visits and is threatened by Star's new friendship with an earthling named Marco.
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.