Behind (S)

Arianne, a divorced mother, obsessed with the idea that her baby falls into the hands of her former husband, during a child's birthday meets Eleanor, an old woman who tells her she sees a man with terrifying aspect stuck to her back. Returning home with her son, suggestion, fear, and those mind demons, which she tirelessly fights against, will make that mother live a night of nightmare... But the maternal instinct is always more powerful than the deepest fears.