Elementary school teacher Florence (Sara Forestier, Perfume: The Story of a Murderer, The Names of Love) is a single mother completely devoted to her pupils, so much so that she shares an apartment on the school's property with her 10-year-old son and pupil Denis. When she encounters and meets Sacha, a disruptive student with a complicated home life, Florence dedicates herself to helping him. But as Sacha's plight and her impending work assessment force her to put everything on the line, including her position within the school and her relationship with her son, Florence gradually realises that one is never too old to learn a new life lesson.