Star hosts a sleepover with her girl classmates and Pony Head. They recruit Marco to play a truth or dare game called "Truth or Punishment", where the Truth or Punishment cube administers punishments to everyone when someone lies, and refuses to free everyone until the game is over. The cube's final question is who is their greatest crush. Marco admits he likes Jackie, but the cube gets angrier, insisting someone else is lying. When Star tells the cube that her preferences can change, the cube gets confused and self-destructs. After everyone goes home, the discarded cube springs to life one last time, answering the question about Star's crush.
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.