Making the most of the family home while her parents are away, 22-year-old Nicole is enjoying a peaceful summer with her best friend, Véronique. When Nicole’s older brother shows up with his band to record an album, their vacation takes an unexpected turn and the girls’ friendship is put to the test. Amidst a rising heat wave, Nicole’s insomnia — and romantic misadventures — mount each day. Tu dors Nicole takes a humorous look at the beginning of adulthood and all its possibilities.