Nathan, 16, lives alone with his father Stephane. A newcomer in high school, he is invited to a party and falls in love with Louis, a boy in his class. They find themselves out of sight and kiss each other, but someone takes a picture of them. Soon, the photo is published on Facebook and a storm overtakes their lives as they face bullying and rejection.

Loïc Le Tallec never really took care of his son. When the latter disappears in a road accident, Loïc is devastated. He has only one idea in mind: to find the one who lives now with the heart of his son. He falls on Hugo, a young man that this brand new heart makes totally unreasonable and uncontrollable. Their meeting promises to be explosive.

On school break, Marinette heads to Shanghai to meet Adrien. But after arriving, Marinette loses all her stuff, including the Miraculous that allows her to turn into Ladybug!