The Sum of Our Lives

Young florist Camilla dreams of changing her life and visits apartments she has no intention of buying.
Eight-six-year-old Margarita is selling her apartment, which she vowed never to leave.
They live on opposite sides of a Parisian street and can only see each other's silhouettes through the window. But Camilla's lies to those around her and Margarita's secrets, carefully hidden since childhood, intersect and respond to each other like an echo.
How to accept your life when you have decided to live another one?