Nine years ago, Jesse (Ethan Hawke) and Celine (Julie Delpy) accidentally met on the train, and their hearts were pounding. After spending a crazy and romantic night in Vienna, they broke up before sunrise and agreed to meet again in Vienna. Nine years later, Jessie has become a best-selling author, while Celine is a member of the French environmental organization. What Jessie tells in her new book is a romantic night nine years ago. While promoting a new book in Paris, Jessie and Celine met in a bookstore, but they only spent the afternoon together. Before sunset, Jessie had to fly back to the United States. The two walked on the streets of Paris in the afternoon and rafting on the beautiful moat. They talked about everything and were in high spirits. But like a trick of fate, happy times are as intoxicating as fireworks but short. Jessie sent Celine again and again, unable to forget; Celine used guitar and singing to miss the deep love in her heart. The sun was about to go down, and Jessie was about to miss the plane. Perhaps what he didn't want to miss was his destiny.