After a successful space mission, the young astronaut Lucy Cola (Natalie Portman) returns to Earth. But since she has traveled the infinite vastness of space with all its splendor, it has changed and begins to no longer perceive reality on earth as such. She feels removed from her own earthly life and especially her husband (Dan Stevens) and most likely suffers from post-traumatic stress disorder, which is why she also seeks psychiatric help. To get out of her deep hole, Lucy begins an affair with a NASA colleague (Jon Hamm) who seems to understand her, her experiences, and her problems better. But when a competitor appears around his heart, Lucy’s jealousy takes over her already battered mind.