Marinette, Alya and her other friends go to eat some ice cream together at a cart owned by André, a famous ice cream maker in Paris. According to a legend, the couple who eats an ice cream at André's place will love each other forever! Marinette hopes that Adrien will be there, but he did not come. For a good reason: he transformed into Cat Noir to prepare a candlelight dinner for Ladybug. Disappointed in Adrien's absence, Marinette refuses to eat the ice cream André gave her. Depressed over the failed romance, André becomes akumatized by Hawk Moth and shapes into "Glaciator", a giant ice cream snowman who solidifies 'single people' into ice cream and they start to melt! Ladybug and Cat Noir must not get cold feet if they want to stop him. In the midst, Marinette comes to know Cat Noir's genuine and sensitive side.