Sterne unter der Stadt plot
Alexander grows up in a small house with his loving grandmother. To avoid his father's fate, he promises her on his tenth birthday that he will never fall in love. Every Sunday, Alexander visits his father, who has retreated to the Vienna subway since the death of Alexander's mother. As a young adult, Alexander wants to be closer to his father and decides to take a job in a long-lost office in the subway. Here he meets the beautiful and lively Caro in her cozy hat shop. Although Alexander has successfully resisted love before, his self-imposed oath now becomes a promise difficult to keep.