How do you become a 'mensch', which means 'a good person' in Yiddish? Thirty-nine-year-old Eliane Weiss (Emmanuelle Devos), from an Ashkenazi Jewish family, is a teacher in a Parisian primary school. She is married to Sylvain (Gérard Darmon), and they have a 17 year-old daughter, Bella (Maïa Rivière). Attentive to the needs of everyone around her, and in particular to those of Rénia (Solange Najman), her mother, Eliane is not completely at ease with her life. Accompanied by two good friends who drag her along, Eliane meets Jeanne Sfez (Idit Cebula), a writer who becomes her 'good fairy'. This important encounter is the start of a new beginning, of a transformation that completely changes the lives of Éliane and those around her. Will she be strong enough to fully follow her desire?