The film depicts the life of Cristina, a young middle-class mother financially supported by an emotionally absent mother. She is haunted by her previous relationship with Walter, the father of Darwin, her son. Habit, comfort and suppression make her numb and loveless. Her fleeting romantic adventures with other men are not enough to push her away from this uncertain equilibrium. The only thing that seems to make sense in her life is little Darwin, who shines a light in her life.