In the kingdom of the Oceans of Andros, Aisha's uncle, King Neptune, is planning a coronation for one of his twin sons, Nereus or Tritannus to become the heir, but when he chooses Nereus, he is disrupted by Tritannus, who King Neptune throws into prison. Meanwhile, the Winx are planning a concert when they meet up with Roxy at the Frutti Music Bar, but an oil ring visible from the beach is on fire and the Winx go on the rig to save the workers with help from the Specialists. Tritannus meets a trio in the same prison as him, the Trix.