Okay kiddo, so "Conspiracy" is a movie all about a meeting that happened a long time ago between some important people in the Nazi party. They got together in a fancy house in Germany and made a plan to come up with a Final Solution.
Now hang on, that might sound like a good thing, but it's actually really, really bad. You see, the Nazis wanted to get rid of all the Jewish people in Europe, and they thought that the Final Solution would be a way to do it.
The movie is all about the meeting and what the people said and did while they were there. It's like watching a play, but on TV. You'll see all sorts of important people, like Heydrich and Goebbels and Hitler, and they'll be talking about how to get rid of the Jews.
Now, it's important to remember that this is all pretend. This movie is based on a true story, but the people playing the parts aren't the real people. And what they're talking about is really, really bad. You should never, ever think that it's okay to hate someone just because of who they are. Everyone deserves to be treated with respect and kindness.