Mathilde is nine years old. Her parents have separated. She lives with her mother, a fragile person who hovers at the edge of madness. It is a story of a unique love between a daughter and her mother.
| Actor | Role |
|---|---|
| LLuce RodriguezMathilde | Mathilde |
 Noémie LvovskyLa mère | La mère |
 Mathieu AmalricLe père | Le père |
 Micha LescotLa voix de l'oiseau | La voix de l'oiseau |
 Anaïs DemoustierMathilde adulte | Mathilde adulte |
| EElsa AmielL'institutrice | L'institutrice |
 India HairLa psychologue | La psychologue |
 Julie-Marie ParmentierMadame Lesieur | Madame Lesieur |
 Francis LeplayMonsieur Lesieur | Monsieur Lesieur |