The Winx want to go to Shadowhaunt and rescue the pixies. Faragonda doesn't want them to, saying that the Under Realm's effects take away their powers, and they can only go if they take a survival test that 75% percent of people fail, and reluctantly lets them take the test. She puts them in an Under Realm environment. Flora's plant magic won't work, and Musa's soundwaves cause a cave-in. Bloom, Stella, and Layla successfully attack some shadow monsters, so the three of them pass the test. They will be going to Shadowhaunt while Flora, Musa, and Tecna will remain at Alfea.
Faragonda says Shadowhaunt is the source of all negative energy, though she doesn't know who Darkar is, apart from his name. She gives Layla some Light Seeds that will rescue them from any dangerous situation. Sky and Brandon will be going with them to Shadowhaunt.
After they arrive at the Under Realm, they reach a locked door that absorbs magic. Four shadow monsters attack, but Stella destroys them with Sun Blast, her power being super effective against them. Brandon blows up the lock on the door. They go through and close the door on more shadow monsters that appear. One almost gets through but Brandon stabs him in the leg in bloody fashion, before Layla barricades the door.
The Under Realm drains Layla, Bloom, and Stella's power, detransforming them. They find different passageways leading to cliffs in the same room. Then shadow monsters attack and trap Layla with slime. Brandon decapitates one monster, causing the ground underneath him to crumble and sending him falling. Stella jumps off the cliff after him.
- Bloom, Stella, Layla, Sky, and Brandon go to the Under Realm, and Stella and Brandon are separated from the others