The Gloomflitter Era begins after the tragic loss of Marinette, when Adrien Agreste, overwhelmed by guilt and sorrow, abandons his role as Chat Noir. Consumed by grief, he secretly takes the Butterfly Miraculous and transforms into Gloomflitter, forsaking his heroic ideals for a dark quest to rewrite history. Driven by the desire to bring Marinette back to life, Gloomflitter becomes a powerful, vengeful figure, plunging Paris into chaos as he seeks to control the Miraculouses and reshape the world, no matter the cost.
Will the new heroes be able to defeat him?