Emma just started her first year of high school. With her new friends Manon, Daphné, Imane, and Alexia, they are gonna attempt to organize the biggest party ever organized by first years. To get there, they'll have to plan it, raise funds, gain popularity and influence, join the trendy party, and have cool friends, among the "big" third years, even if it means redefining some friendship, their relationship, breaking heart, have yours broken...

Manon is a mysterious teenager who is more mature than others in appearance, from her friendship with her new friends to the tormented relationship she has with Charles, the most popular guy at school.

Lucas falls in love with the new arrival Eliott, clashing with the image his friends Yann, Basile, and Arthur have of him. He begins closing himself off in denial before accepting himself for who he is and living his love life fully.

Imane Bakhellal is disturbed by the irruption in her life of Sofiane, a friend of her brother. This arrival will lead her to search her way between her parents' expectations, her desires, and her beliefs. This journey is universal: the one of a teenager oscillating between the love she has for her family and her values; and in the quest for her autonomy and her identity.

Arthur Broussard sees his life suddenly change following a hearing shock. An upheaval that will impact his daily life and his relationship with others, but to what extent?