Emboldened with this power, Adora leads a group of other magical princesses in an alliance to defeat the evil Hordak and his Horde.
Adora, a young cadet who lives a sheltered life in the Fright Zone, is promoted to force captain of the Horde, an evil army led by Lord Hordak that rules most of the planet Etheria.
After accidentally crashing their ship in the woods, Adora finds a mysterious sword and begins having visions upon touching it.
When a giant spider creature appears, Adora grabs the sword and transforms into a large warrior princess.
They escape Beast Island and return to Bright Moon before Adora races to the Crystal Castle to stop the weapon.
Double Trouble, having switched sides to the Rebellion for their own survival, assists Glimmer in getting into the Fright Zone with Scorpia.
While the others create a distraction for Entrapta to destroy the hive network, Adora, Glimmer, and Bow descend to the Heart of Etheria.