Taking place before the sixth season, the Trix try to activate the might of the Emperor's Throne and inadvertently free the evil nymph and Sirenix fairy, Politea. They kidnap Sky to free Tritannus from Oblivion and acquire a magical pearl from the Coral Wreath that will allow them to obtain the vast and unequaled power of the Emperor's Throne. The Winx will have to go on a Sirenix mission in the endless depths of the Infinite Ocean to stop them and save Sky.
