Ageing and de-aged! Probably started out like… Beth was all sad n stuff because she noticed she was getting crows feet or somethin’. Rick wants her to stop crapping on so He makes some device or serum to get rid of the wrinkles. It fucks up. Tries to fix it and fucks up several times. Summer takes no place in this, she just turns up at the end and is all “What the hell”. The end.