It’s literally just a recap of the series with very little new dialogue between nagisa and karma, I don’t recommend it if you’re just planning on watching it if. I say this yet Why am I giving it a 5 star? If you’ve already watched the series, I’d say it’s great to watch the movie if you want to have a nostalgia trip. I Personally haven't touched assassination classroom since I first watched it 5 or so years ago, I wanted to get back to it but I remembered this movie (I didn’t watch it when it came out), and it was great, it refreshed my memory of the anime and covered the important parts of the series. Once again, I recommend the movie if you already watched the show and want to have a nostalgia trip, I don’t recommend the movie if you haven’t watched the show yet since it’ll spoil it for you and you won’t see most of the stuff that’s on the show.