Plot summary
Yellow and Blue Diamond (Patti LuPone and Lisa Hannigan) have ceased attacking the Crystal Gems after learning that Pink Diamond and Rose Quartz are one and the same. They address Steven (Zach Callison) as Pink Diamond as well, despite his attempt to explain that he is a different person.
The two Diamonds also learn that their attack millennia ago in response to Pink's ostensible demise corrupted the remaining Gems on Earth into feral monsters, instead of obliterating them as intended. Steven convinces them to try to heal the corrupted Gems, but the three's combined attempt to restore the corrupted Gem "Centipeedle" to her original form Nephrite (Aparna Nancherla) produces only a temporary recovery. The Diamonds suggest they could permanently heal corrupted Gems with the aid of White Diamond, who has not left the Gem Homeworld in eons. Pearl (Deedee Magno Hall) warns Steven that White is like no other Gem, not even the other Diamonds.
As the Diamonds' spaceships were destroyed in the previous battle, in order to travel to Homeworld, Steven unearths Pink Diamond's long-abandoned ship, which is shaped like a giant pair of legs, from her junk pile in the desert. Steven, Pearl, Garnet (Estelle), Amethyst (Michaela Dietz), Connie (Grace Rolek), Yellow, and Blue prepare for the journey. Bismuth (Uzo Aduba), due to her animosity toward the Diamonds, decides to stay on Earth and look after the gems of Peridot and Lapis Lazuli, whose physical forms were destabilized during the battle. She advises Steven to take advantage of the fact that the Diamonds think he is Pink Diamond in order to assert himself among them. During the journey, the Diamonds become anxious at the prospect of facing White, fearing her response to learning the truth about the rebellion.
Upon arrival on Homeworld, the group is surprised to be greeted by a large crowd of cheering Gems. Although Yellow and Blue intend to speak with White first to defuse any possible backlash, White Diamond's Pearl (Christine Ebersole) unexpectedly appears and spirits Steven away. Steven is brought to White Diamond (also voiced by Ebersole), who welcomes "Pink Diamond" back without giving him the opportunity to speak, and sends him away to an isolated, empty pink room.
Credits
Adapted from Wikipedia contributors, Legs from Here to Homeworld. Paragraphs and formatting adjusted; illustrations, reference markers, block quotations and non-story material omitted.