After a bad breakup, Georg goes back to live with his father Frank. His greatest desire is to be a father, and his greatest fear is to become as paranoid and intolerable as Frank. Georg, still feeling sane, starts writing letters to his future son while looking for a mother worthwhile…

When Norwegian scientist Marie attends a seminar in Paris on the actual weight of a kilo, it is her own measurement of disappointment, grief and, not least, love, that ends up on the scale. Finally Marie is forced to come to terms with how much a human life truly weighs and which measurements she intends to live by.