After Morty requests to have a traumatic memory deleted, Rick reveals a room where he has been storing a number of memories he has removed from Morty's mind, including those about how he drove an innocent man to kill himself, or how he accidentally sent an alien to hell. However, as it turns out, besides the memories that Morty did not want to keep from their adventures, the room also contains memories in which Rick was made to look foolish, so he had them forcibly removed from Morty. This revelation prompts a fight, during which Rick and Morty have their memories accidentally erased.