Marinette Dupain-Cheng, fifteen years old, student at Collège François Dupont, eleventh grade, most known for her alter ego Ladybug.
Adrien Agreste, fifteen years old, student at Collège François Dupont, eleventh grade, most known for his alter ego Chat Noir.
After defeating Miraculous Queen and recovering the Miraculous box, Marinette, the new Guardian of the Miraculous, guides Master Fu to his so deserved new life with the woman he loves. The responsibility she has upon her shoulders is only comparable to a handful of people in the whole human history.
Meanwhile, Gabriel Agreste and Natalie Sancoeur, now in possession of the deciphered version of the Miraculous Spellbook, were able to repair the Peacock Miraculous, now safe to be used by Natalie as Mayura.
While that, Luka and Kagami destroyed what seemed an indestructible love between Marinette and Adrien, that moved on with their lives, giving up their feelings and embarking in a new romantic journey they won't be sharing anymore.
What awaits our heroes that, while defeating Hawk Moth and repairing all damage with Miraculous Ladybug, may as well have lost all their hope alongside the memory of Master Fu?