Die-hard fans of the 1980s, Vincent and Antoine run a company that supplies doubles of faded stars throughout the whole of France. What starts out as a promising business venture ends up as a calamity when Vincent and Antoine have over forty engagements booked but no one to attend them. They then have a brainwave. Why not get in touch with the real stars of the 1980s and persuade them to make a comeback? Why make do with an imitation when you can have the real McCoy?

Kagami drags Marinette to Tokyo to help the Stellars defeat a new supervillain, but Marinette soon realizes her friend has another, untold reason for this trip to Japan.