A coming of age story in the tradition of Marjane Satrapi's Persepolis, Tillie Walden's Spinning, and Mariko Tamaki's This One Summer.

Antoine, a teenager, is on holiday at the seaside with his parents and his younger brother, Titi. Both spend most of their time drawing, at restaurants and on the beach. But one day Hele`ne and her mother come to spend a few days with the family and her presence will change Antoine's life.

In A Sister, Bastien Vive's, a master storyteller, conveys the stumbling awakenings of adolescent feelings.