Episode summary and screen captures courtesy of Robert Labandeira.
Plot Summary: Observing the destruction of Etheria thanks to the inner hacking, Catra discovers that not only are the Whispering Woods frozen over, but the other princesses are now weaker as their runestones are losing power. Catra then initiates a full-scale invasion to march on Bright Moon and destroy the rebellion.

Rendezvousing at Bright Moon, Adora, Glimmer, Bow, Angella, and Swiftmoon realize the dire situation. They must protect Bright Moon and prevent its runestone from being destroyed or else all hope will be lost. Discovering the Horde is on its way, Bright Moon sends out a distress beacon asking for help in the upcoming battle. No other princesses arrive aside from Spinnerella and Netossa. Adora then reflects on her failure to bring Catra to the rebellion, and starts to believe She-Ra has to be the only one to stop the invasion. Adora’s friends then decide to fight together, heading to the armory. Angella discovers them and gives the new army her blessing, even giving Glimmer Micah’s staff.


The Horde arrives at Bright Moon and a colossal battle ensues. The Princess Alliance starts off strong, but eventually the onslaught of Horde troops and tanks starts overwhelming all the warriors. Angella desperately tries to keep the runestone alive, but soon finds herself fighting for her life as Horde forces start to breach the temple. Things are made worse when Catra separates She-Ra from the rest of the army and starts psychologically attacking her, causing her defeat. Scorpia pins down Glimmer, while Bow, Spinnerella, and Netossa are overwhelmed by ground forces. Eventually, all of Bright Moon’s warriors are surrounded.

As it seems like all hope is lost, Mermista, Seahawk, Perfuma, and Frosta arrive just in time to save Bright Moon’s runestone from collapsing and join the battle. Using their combined efforts, the Princess Alliance successfully repels the Horde back. She-Ra finds her inner magic, and uses the sword to restore the runestones for the other princesses back to their full power. This, in turn, shuts down Entrapta’s hacking device, saving Etheria from chaotic destruction. Glimmer’s glitching is healed, and push the Horde back to the Fright Zone. The Princess Alliance is reunited, as they prepare for some more fights in the future.


Back at the Fright Zone, Catra and Entrapta are able to convince Hordak that despite the failure of the invasion, they still know more about First Ones tech than anybody else, and that the Whispering Woods is still in ruins. Hordak then promotes Catra to second in command.
