17-Year-old Tina is a girl from an ordinary well-off family in the suburbs of Paris. Before the prom actually starts, her biggest dream is to marry the handsome and promising young mayor of the town. However, her family accidentally arranges for her to meet the talented Mr. Del. She begins to hesitate. Should she try her best to marry into a wealthy family or grow old together with the extraordinary Mr. Del? Everything is waiting for the dance to begin.