To take her mind off her strained relationship with Marco, Star ditches the Diaz's summer break party and joins her friends in a much more dangerous event.
Star needs to be prepared for an evaluation that will determine whether she can stay on Earth. Marco misuses Star's dimensional scissors and gets himself into some trouble.
When Star returns to her home dimension, she discovers that magic is disappearing throughout the kingdom. Star must dig deep and challenge her arch nemesis Ludo in an effort to save her family and kingdom.
When Marco gets kidnapped by Toffee and held as wand-ransom, Star enters into an unlikely alliance with Ludo: she'll help Ludo get his castle back, if he helps her save Marco.