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 best party clothes 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 starts to boss everyone around AND 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 their friendship survive the term? And will Mira and Dave get to show everyone their awesome, synchronised disco moves?!