Adrien Agreste/ Chat Noir gets abandoned by Ladybug even after she promised never to do so and is also replaced by all of the other superheroes. So feeling hopeless Adrien quits being Chat Noir. Marinette Dupain-Cheng gets overwhelmed by losing her closest friend but she also finds out the truth about what really caused Chat Noir to become Chat Blanc. She is merged with the Ladybug of the alternate timeline and given her memories. Then she learned the full truth behind their relationship and she can't help but miss him. So when she sees a shooting star, Marinette makes a wish to have him back.