"Oh, snap. It's over. Rick and Morty are in the big one, the afterlife. No, for real this time, seriously. OK. You got us. They're in the afterlife, but which one?! Will they find the second Fact of Science in time to save all of reality?! Rick and Morty travel through various cultural interpretations of the afterlife in search of the second Fact of Science in order save all of existence.
But what about that damn fine hat, you ask? It's there. Square upon Rick's pointy dome. Maybe it knows the secret?"