Whilst on holiday with her family, seventeen year old Isabelle (Marine Vacth) experiences her first sexual relationship with an attractive young man. A few days later, and for no apparent reason, Isabelle casts him aside and behaves as if their encounter never happened. When she returns home to Paris, Isabelle begins a dangerous new career; she sets up a profile on an escort website and lies about her age in order to make appointments with older, wealthy clients in chic, expensive hotel rooms. On one hand she is a cool professional, catering to the sexual whims of the various men she encounters; on the other she is maintaining the illusion of being a regular school student for her parents and friends. However her double life spirals out of control, and she is forced to deal with the consequences of what she has been doing.