The impoverished Christine (Catherine Fleur) walks lonely through the streets of Paris, looking for supplies from the food bank day after day to survive. On a cold winter day, an eight-year-old boy, Suli (Mahamat Yafa), stands crying in her roost. After asking, Christine finds that Suli has lost his mother. The similar situation of the two makes them embark on a journey full of love and hope to find their relatives. Together, they bravely venture into the underground world of Paris to try to find Suli's mother.