During a meteor shower, Lala and Hikaru discover a star-shaped alien named Yuma in their home. As they care for the mischievous creature, they bond over music and exploration. However, their peaceful time is disrupted when alien hunters target Yuma, revealing a deeper connection to the galaxy. The Star☆Twinkle Precure must protect Yuma in a celestial showdown to safeguard all they hold dear. Can Yuma sense the Precure's feelings through music, and will they make the sacrifices needed to defend their world?