Aquí hay un gato de más (Miraculous, 2) (La Biblioteca rosa)

Am I seeing double, or is there more than one cat here? Ladybug is stunned to learn that Cat Noir has stolen a painting from the Louvre. But her partner in crime sets her straight: it wasn't him who stole the painting, but someone impersonating Cat Noir. Ladybug will have to get her act together and find out who this strange doppelganger is who's disturbing the peace of her beloved Paris and its museums.