Lessons are getting more intense. The aspiring fairies experience their first outdoor training in the mysterious Black-Mud swamp. But the training is interrupted by an emergency landing of the Specialists' aircraft. The Specialists are on their way to transport a troll to the Magix Prison. The rest of the episode is a wild-goose chase for the dangerous troll, who escaped when the aircraft landed. As the fairies and Specialists search deeper into the swamp, they get lost in this labyrinth-like place. They will have to apply all their skills to get out of this life-threatening maze. 
 

The Winx sneak into the eerie CloudTower to challenge the three witches again, hoping to get the ring back. Meantime, the Trix discover that Stella's ring does not hold the legendary power they are looking for. The Winx manage to get the ring back, and while fleeing, they accidentally step into the compound of the famous ‘Crypt of the Magic Archive', the most secret vault of Cloud Tower where complete records of every fairyland and fairy are kept. However, the place is full of never-ending traps and danger… and a mysterious voice speaks to Bloom...