The Star Case takes the Winx to Melody, Musa's planet, where they discover that the fifth prime star has been incorporated into the crown destined for the winner of the dance competition organized annually by Princess Galatea. The Winx and Trix, with the exception of Musa and Darcy, thus find themselves competing on the track in one-on-one challenges to grab the crown. Meanwhile, Musa visits her father and receives an unexpected visit from Riven, who is however under a spell cast by Darcy.