Everyone at Unicorn School is SUPER excited about the end-of-term school disco - the pupils and their unicorns can't wait to put on their party outfits and hit the dance floor! Darcy is heading up the disco committee and she is determined to make it the best party EVER. But then she hijacks the quest trying to find more glitter for her giant disco ball, putting everyone in danger! So it's up to Mira and Dave to put things right. Will Class Red make it out of the Crystal Maze Mine? And will Mira and Dave get to show everyone their awesome disco moves?!