Paloma is an 11-year-old girl quietly and unhappily living in a luxurious Paris apartment with her family.
She is intelligent and observant and, sensing disappointment and despair in adulthood, decides to end her life on her 12th birthday, which is 165 days away from when the story begins.
Her father's old camera in hand, she records telling moments in the lives of the inadequate humans around her: her antidepressant-dependent mother, her moody sister, and petulant dinner guests.
She hides her passion for literature from her bourgeois employers, but is found out by the new resident Mr. Ozu, widowed Japanese, as a beautiful bibliophile in elegant disguise.
A fiercely tender attraction grows between the three like-minded individuals, showing Paloma a more lovely side of life than she originally thought possible and forcing her to reconsider her plan of suicide.