The Pet Pals are put to the test when the Evil Crow Witch is determined to drain the canals of Venice. Armed with a touch of magic, the Pet Pals combine their strengths to uncover the secret code before the Evil Witch does.

Sixteen years ago the most powerful warrior wizards of the Magic Dimension sacrificed themselves to fight against absolute evil. Now the fate of a kingdom is in the hands of a young girl - Bloom, the fairy of the Dragon's flame. Accompanied by her Winx Club girlfriends, Bloom must overcome the greatest challenge of all: enter the depths of the obscure dimension, fight against evil to bring her parents back to life and reveal the mystery linked to her origins. The destiny of the entire Magic Dimension depends on the outcome of this conflict.