Han and Leia had kids. One they named Ben. He was being trained by Luke with some other Force sensitive kids at Luke's new Jedi academy. Supreme Leader Snoke, who comes out of nowhere and is not explained but is clearly evil because he's got that pale deformity thing dark side people have, lured him to the dark side. Ben slew all the other apprentices and became Kylo Ren. Neither Kylo nor Snoke were referred to as having Sith titles which I found odd, but Snoke did mention "finishing his training" which may come with a promotion and a new job title.

Rey is the orphan girl on the desert planet. Who her parents are and why she was abandoned there isn't explained. My theory is she's Leia and Han's other child, who they hid away when Ben went dark side in order to protect her. The Force intervened and brought her out in to the world. She ends up finding Anakin's lightsaber in a box of stuff beneath a cantina. No, I'm not making that up. She has a vision and freaks out and runs away. Kylo hunts her down because she's seen the map that leads to Luke Skywalker who went away and hid after Ben turned.

The new character of Finn was a red herring. He's not a Jedi, he's a former storm-trooper who doesn't fire a single shot during his first mission. He has a panic attack and breathes heavy a lot and decides he's in love with Rey so he goes to rescue her but she's busy rescuing herself.

Poe Dameron is the new Han character but he didn't get much screen time because the old Han character was still around.

Was.

Han takes Finn and Chewie on a mission to destroy the new Death Star type weapon that is literally a planet with a massive terraforming thing happening that sucks up an entire star and uses it to fire a blast of energy from hyperspace (so faster than light but they can still see it coming because Star Wars physics) and destroys not only Coruscant but every planet and moon in the Coruscant system. It's a big weapon but the Resistance (the name for the Republic's anti-First Order paramilitary wing) destroy the heat-sink on Death Star 3.0 and it overheats and implodes.

Han, while destroying the heat sink, confronts his son. He meets him in the middle of a catwalk over a vast chasm. he tries to bring him back like he promised Leia he would. His son says he is conflicted and doesn't know what to do. Han tries to help. Kylo hands over his lightsaber and Han puts his hands on it. Kylo turns it on. Han gets run through, but as he's dying all he does his stroke his son's face before he falls in to the chasm. It was actually a pretty good scene. Ford and Driver sold me on it, even though I'd guessed Ford would be killed off in this movie because he'd wanted to be killed off from Star Wars since Empire.

So Han's dead and it was a really good scene. Chewie goes nuts, shoots Kylo with his bowcaster which is ridiculously OP and Kylo gets hurt bad. Then Kylo chases Rey and Finn and Finn uses Anakin's lightsaber and sucks at it and get his shit ruined and he's nearly dead at the end of the movie. I think he'll be full of cybernetics next movie. Rey uses Force pull, grabs Anakin's lightsaber and duels Kylo, who as I said is hurt bad and can't fight properly. Rey manages to score some good hits (she's had a rough life and is good in a scrap, as we see earlier in the movie with some thugs when he's an orphan Annie) and leaves Kylo with some major wounds (and Chewie's blaster hole in his side) so he'll be "more machine than man" next movie, just like Grandpa Vader.

Rey leaves before the Resistance celebrate destroying Death Star The Sequel The Sequel and uses the map to find Luke. He looks absolutely haunted and yet hopeful as Rey shows up with Anakin's lightsaber.

Fin

There's more but I'm tired. You have been properly spoiled.