When one story ends, another begins. How do you move on after losing someone you love? How can you rebuild your life, turn the page? For Louisa Clark, called Lou, as for everyone, starting over is very difficult. After the death of Will Traynor, whom she fell madly in love with, she feels lost, empty. It has been a year and a half now, and Lou is no longer the same. The six intense months spent with Will completely transformed her, but now it is as if she has returned to the starting point and she feels she must give her life a new direction. At twenty-nine, she almost accidentally finds herself working in a shabby bar at a London airport where she watches the comings and goings of people in despair. She lives in an anonymous apartment where she does not like to stay and reconnects with her family without real prospects. Above all, she wonders every day if she will ever overcome the pain that suffocates her. But everything is about to change. One evening, a stranger appears at her doorstep, and Lou must quickly make a decision. If she closes the door, her life will continue as it is: simple, ordinary, resigned. If she opens it, she risks everything. But she promised herself and Will to live, and if she wants to keep that promise, she must let in what is new.