- Kylo is on the First Order planet with Hux and Snoke, and the rest of the First Order army.
- His introductory scene is outright killing an unarmed prisoner while Snoke eggs him on (this is his "training").
- Snoke's plan and backstory are partially revealed, and it's pretty weird so bear with me:
- Eons ago, an order of Force-sensitive warrior monks defeated these gigantic cosmic abominations that were uber-powerful in the dark side and were wreaking havoc on the galaxy. These warriors used the Force to split the horrors' souls/essences from their bodies. The bodies naturally decayed like anything else, but their souls lived on, exiled beyond the rim of the galaxy. These warrior monks became the first Jedi knights, and their leader was the first chosen one to bring balance to the Force.
- The ghosts of the space Cthulhus desperately want to return, but they need a physical host to act as a vessel.
- Snoke is basically just a powerful dark side dick who wants to rule everything. He's trying to turn Kylo into a vessel of pure darkness, so that the evil space demons can possess him. Then the possessed Kylo can be his personal weapon, acting at his beck and call (which surely won't backfire in any way because summoning evil entities more powerful than yourself always works out great for villains who do so, it never fails).
- Kylo sort of knows this, but doesn't really care because he's just thinking about the power.
- Snoke tells Kylo that the chosen one is Rey, and that he needs to kill her to complete his training.
- Kylo goes to the Republic planet with his Knights of Ren in tow for backup and launches an invasion. Phasma's already lowered the shields at this point.
- He meets a detained Vikram who was put in prison by Leia, and Vikram calmly calls him a dirty dog of the enemy and a patricidal maniac, and that he can't believe someone like Leia - who he dislikes but still respects - could spawn such a horrible person. Kylo decapitates him.
- Kylo captures Finn and Poe and begins to torture the former; he avoids confronting Leia and leaves that up to Phasma.
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- Rey and Luke hyperspace into the Republic planet's system and the action begins, with the small Republic/Resistance combined fleet engaged in a space battle with the First Order. We get an actual in-space dogfight (unlike in TFA).
- Luke and Rey (with Chewie in tow) touch down on the Republic planet and kick ass. They free Finn and Poe (Leia is elsewhere), but Kylo and the Knights of Ren show up.
- Rey takes on Kylo, Luke takes on the Knights.
- Luke fights all the Knights by himself, without a lightsaber, using hand-to-hand combat, and wins.
- Finn and Poe (and Chewie) free Leia, and are confronted by Phasma and Chala. Chewie KO's Phasma, and Finn stuns Chala.
- Rey and Kylo have a crazy duel in a power planet/generator room thing, because there's always one of those hiding around the corner in every upscale Star Wars city. They're evenly matched. In a shocking twist, no arms are lost. Kylo tells Rey to join him, and that together they can overthrow Snoke and take charge of the galaxy, light and dark side-by-side. Rey resists and Force-pushes him back pretty hard.
- Before Kylo can retaliate, Snoke walks into the room. He apparently tagged along in secret to watch how Kylo would conduct himself. He isn't impressed. He calls Kylo a failure, and uses the Force to throw him around like a rag doll.
- Rey charges at Snoke with her lightsaber and slashes, and Snoke literally grabs the blade with his bare hands to block it, using the Force to resist any damage. He then physically pushes the blade of energy back into its emitter, and chides Rey for using toys and thinking they're real power.
- He says she'll make a much better apprentice than Kylo judging by the power he can sense in her. He kidnaps her as Kylo watches, and departs the planet.
- Luke senses Rey in danger and runs to the generator room, finding Kylo on the floor. Kylo divulges that Snoke took her. Finn and co. show up shortly after him. Leia and Luke meet for the first time in a very long time. Leia and Kylo meet for the first time in a very long time. Luke and Kylo meet for the first time in a very long time. It's awkward and complex for everyone.
- The First Order fleet suddenly pulls back on Snoke's command. Hux is confused, but Snoke tells him that everything is going better than expected, and that soon Rey will bring the First Order the success Kylo never could.
- Finn confronts Chala in her cell. She still thinks he's a traitor. He explains his position, and what he saw the First Order do on Jakku, and why he had to leave. He overcame the conditioning, so anyone can, including her. She's still not buying it but the seed is planted for her redemption plot to maybe be in Episode IX.
- Kylo is critically injured but he'll make it. He’s spiritually broken. Luke tells him in a hushed voice the story of Anakin Skywalker, who became Darth Vader but was ultimately redeemed. Kylo doesn't say anything, but cries while listening.
- Leia and Luke meet again and discuss things. Leia refuses to go see Kylo, saying she can't. Luke understands. A group of senators interrupts to tell them that they've already voted. Leia is confused and says on what, and they tell her she's been selected to be the interim commander-in-chief of the Republic to replace Vikram, whether she likes it or not. She's flabbergasted, and Luke cracks a sly smile.
- Finn and Poe have a scene where they're sitting on the bank of a canal in the city where Finn went out on a boat with Chala. They reinforce their bromance, and decide with resolve to go save Rey, regardless of the consequences. Luke steps out from behind a building where he was listening in, interested to finally meet Finn, who Rey left to go help. He tells them that if they're going to save her, he's in, but he'll need an X-Wing.
- Last sequence of the movie is the Republic fleet starting to reassemble after communications have been restored, lots of different ship designs from all over the galaxy, a quickly thrown together (but sizable) army. Leia is looking out the open docking bay of her capital ship at all of the craft coming in from hyperspace. Luke puts his hand on her shoulder while wearing pilot gear, and then gets in an old-school X-Wing with R2 docked. Poe gets in his X-Wing with BB-8. Finn gets settled in the Falcon with Chewie.
- Leia and C-3P0 watch all three craft leave the ship and join the greater assembly as the music swells, in a scene echoing the last shot of ESB.