Tilda's days are strictly structured: she studies, works at the supermarket checkout and looks after her little sister Ida - on some days she also has to look after her alcoholic mother. But this summer brings a change: Tilda receives a promising job offer for a doctorate in Berlin. Viktor also turns up, who, like her, always swims 22 laps in the swimming pool. When Tilda begins to believe that everything could be better, the situation at home spirals out of control.