Riven, under Darcy's spell, attacks Musa. At the Magic Dance competition, the Winx are in great difficulty. Who will prove to be the best at dancing and get the fifth Prime Star?

The Winx leave for Flora's world, Lynphea, where the fourth Prime Star is hiding. Here, Flora catches up with her sister Miele. But Darcy uses her illusions to take the shape of Miele and deceive ...