Sarah leads a dull, lonely life until the day she finds Léo, 11, hidden in the trunk of her car. Shaken, Sarah decides to protect Léo, who doesn't yet know that his father just died in a shootout. As Commissioner Simon Donatelli goes after them, intrigued by Sarah's troubled past, the woman and child find themselves involved in a chase to save their lives and a strong, moving, quasi-mother/son bond will form between them.