Paris 1979. At the height of the Palace disco years. Rose, a 16-year-old girl raised in foster care, and her fiancé Michel, 22, are passionately and unguardedly in love for the first time. They are part of the “in” crowd, only interested in partying and living life to its fullest. One evening, they meet Lucille and Hubert, a bourgeois-hippy couple, who are going to take Rose and Michel under their wing – and shake their existence to the core.