Mira and her unicorn friend Dave (their UBFF: Unicorn Best Friends Forever) are excited to take part in Sports Day at Unicorn School, eager for games, medals, and perhaps a magical Rainbow Quest. But things go completely awry: the sacks for the sack race are sewn shut, the eggs for the egg-and-spoon race have gone rotten, and the PE kit disappears! Between pranks, chaos, and mystery, Mira and Dave must figure out who is behind all the sabotage before everything falls apart. They’ll need teamwork, unicorn magic, and a lot of quick thinking to save Sports Day from disaster.