Now that Paris knows that Ladybug is the worst hero ever, they want her gone. However, something must be done first. Determined not to make the same mistake again, Master Fu, the Guardian of the Miracle Box, entrusts Adrien with choosing the new future holder of the Ladybug Miraculous and teaching her the ways of being a good hero through using the Bee Miraculous. How will the city react to this new heroine?