Okay, space opera in Scientology is like a really long and exciting story that takes place in outer space. It's like a movie or a TV show, but it's all made up and there are aliens and spaceships and all kinds of crazy stuff happening.
The people who believe in Scientology think that this space opera story is actually real, and that it happened a long time ago in a galaxy far, far away. They believe that we are all reincarnated souls from that time, and that we have been reborn on Earth to learn and grow and eventually return to our original alien bodies.
The space opera story is really complicated and involves all kinds of characters and situations, but the main idea is that there was a war between two different alien races. One race was trying to take over the galaxy and the other was trying to stop them.
In the middle of all this, there was a group of aliens called Thetans who were just trying to live their lives peacefully. Unfortunately, they got caught up in the war and ended up being captured by the bad aliens. The Thetans were trapped and brainwashed, and this is where things get really weird.
The bad aliens used a machine called the Implant Station to put false memories and ideas into the Thetans' heads. They made them forget who they really were and convinced them that they were just regular humans living on Earth. This is what Scientology calls the "Wall of Fire" and it's supposed to be the reason why we are all so messed up and unhappy.
The good news is that Scientology has a way to help us remember our true nature as Thetans. They call it auditing, which is basically a kind of therapy where you talk through your problems and try to uncover the false memories that are holding you back.
So if you believe in Scientology, you think that the space opera story is real and that we are all Thetans who have been brainwashed into thinking we're something else. And the way to get back to our true selves is to do this auditing process and clear away all the false memories and ideas.
It's a pretty wild idea, but for some people, it's a way to make sense of the world and find a deeper meaning in life.