Shiver and Frye find a strange artifact from the human era and it takes them back in time to Paris where Monarch is threatening the world and Ladybug and Cat Noir must save it. The former cephalopods are given their own Miraculous upon entering this timeline and must help Ladybug and Cat Noir save Paris once and for all. ^A bit canon divergent from Miraculous bc I haven't seen episodes past season 5!^