Adora, Micah and the princesses search for a way to fight back and to rescue Glimmer. On Horde Prime's flagship, Catra schemes.
While Adora takes a much-needed rest, Mermista reluctantly leads the princesses into the Fright Zone so Entrapta can try to trace Horde Prime's signal.
As Bow, Entrapta and Adora attempt to keep Mara's ship functional, Horde Prime orders Catra to betray Glimmer – under threat of a memory wipe.
Forced to land on a desolate planet to replenish the ship's fuel crystals, Adora meets three siblings on the run from Horde Prime.
Adora surrenders herself to Horde Prime, hoping to buy time for Entrapta, Bow and Glimmer to rescue Catra and hack Horde Prime's server.
The team tries to keep the ship working and evade Horde Prime's pursuit. On Etheria, Micah struggles to relate to Frosta during a mission to Elberon.
Mermista, Scorpia, Perfuma and Sea Hawk go undercover underwater to recruit Prince Peekablue. Netossa notices that Spinnerella is acting strange.
The squad heads to the planet Krytis to find a way to get past Horde Prime's blockade on Etheria. Shadow Weaver appeals to Castaspella for help.
While Wrong Hordak's message of dissent spreads throughout the empire, the squad infiltrates the town of Erelandia to get a lead on their friends.
Adora, Catra, Perfuma and Netossa reenter the Fright Zone to rescue Scorpia while Bow and Glimmer head to the library to check on Bow's dads.
A strike team infiltrates Mystacor, searching for the Heart's failsafe, the Crystal of Arxia. Entrapta and Swift Wind gather data on the chip network.
The best friend squad heads for the Heart while the princesses attack the spire so Entrapta can disrupt the chip network. Horde Prime makes his move.