After another akuma attack, a blue swirling portal sucks Cat Noir and Ladybug up and spews them into the Cave in Happy Harbor. When the team gets back from a mission, there are two strangers; a bug and a cat. While Batman tries to figure out how the new duo got here, the team, and the duo from Paris make friends. I don't own Miraculous Ladybug or Young justice. If I did, things would be a lot different.