Uh-huh. It's really confusing, but the people who first came here created a sort of machine that ate worlds though us and... it was really bad. But a bunch of us went down to the machine that was doing it and beat it up, so it can't do that anymore.

Now, we just have to stop the thing that's corrupting the world and we're all set to go!

[That's oversimplifying the situation, but, yeah...!]