Winx Club: Season 5, Episode 4 - ProjectFreeTV

5 - 4: The Sirenix Book

The Winx head back to alfea in order to discover a new power to help them in defeating Tritannus. They discover a mysterious book that holds a lot of secrets about the powers of the fairies under the sea. The book also tells them about the secret of Sirenix and that it involves a curse.