Demain.
Emma lives in New York and is searching for the love of her life, while Matthew, a widower living in Boston, is still grieving the loss of his wife and raising his young daughter.

They arrange to meet at a restaurant in Manhattan, but something strange happens: they both arrive at the same time and are seated at the same table, yet they never see each other. They soon realize they are victims of a reality that defies their understanding, and their missed connection is far from a simple misunderstanding. The novel is known for its intricate plot, psychological suspense, and its exploration of themes like love, destiny, and the nature of time.