Today is a great day for Marinette: she and her friends, Mylène, Rose, Juleka, Alix and, of course, Alya, have come up with a flawless plan to help Marinette propose a romantic stroll to Adrien. But nothing is going as planned and Adrien's bodyguard, annoyed by the girls, becomes Hawk Moth's target. However, while the latter tries to akumatize him, the bodyguard calms down when he sees Adrien. Instead, Hawk Moth has to deal with something unexpected: the akuma goes and transforms a young baby child, who is upset and crying, turns into "Gigantitan", a fifty-foot (disobedient) giant baby, who would stop at nothing for a lollipop!