Set after Miraculous Ladybug, an old friend of Adrien's returns to Paris after a long time away, with a secret of his own he'd rather not embrace. But upon being reunited, further involved with the world he never wanted to be a part of. As Ladybug and Cat Noir continue to protect Paris from Hawk Moth and his Akumatized victims, they soon come across a new identity lurking within the shadows of Paris. While they've yet to determine if this newcomer is a friend or foe, Hawk Moth sees it as a greater opportunity unfolding. How will Paris react with the new arrival of Zapirius?
In the epic conclusion to the Devil's Deal series, Freya has one final chance to discover the full potential of her own power, and to use it to restore balance in the universe - once and for all. After the destruction caused by Roisin, Ferya and Torix come to terms with their losses and mistakes... And prepare for a final battle that will change everything.