Guidance counselor Mr. Candle tells Star that she is fated to be Queen of Mewni. She has to read her mother's book on how to act like a queen but she gets frustrated and decides to dress up in a more rebellious punk style. Meanwhile, Marco, who is displeased of Candle's career suggestion of being the head janitor on Garbage Island, discovers that Mr. Candle is actually in cahoots with Tom, who planned to ensure "Starco" doesn't happen. He confronts Mr. Candle but is captured by Tom, and must duel Tom to get his freedom.
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.