Marinette Dupain-Cheng is an average peasant girl growing up in a small village named Parisilia. It is strictly under the rule of King Gabriel. Since her father was murdered by the King's men years ago, she has learned to fend for herself with the help of her friend Alya. Living in the village isn't easy, especially when the taxes are raised and getting by is made increasingly difficult. So Marinette has to do something about it. But how could she as an average peasant girl? Her plan is to overthrow the kingdom. Feeing hopeless, Marinette nearly tosses aside this idea. On a cold and dreary night, when a fairy godmother grants her biggest wish, she has the ability to transform into Ladybug, a spotted hero who will demand change for the village. But she'll find that it's easier said than done when she unexpectedly meets Prince Adrien. Will Marinette ever have a happy ending without jeopardizing the lives of the ones she loves?

[Mariposa Spanish for Butterfly] Today was the day. The day when Marinette would tell Adrien how she felt about him. But then... It all goes wrong... Witness the fall of Ladybug and the rise of Mariposa, Princess of all Akuma's.