A young American, Jesse, meets a beautiful Frenchwoman, Celine, on a train. They immediately find many common topics of conversation, and Jesse persuades Celine to get off with him in Vienna to spend the evening and night together since the next morning he must fly home to the States. That night a miracle happens, a love so strong is born between a man and a woman that everything else ceases to matter. However, the inexorable countdown continues, there is very little time left until dawn, and the lovers use every precious moment to get to know each other better, to have time to exchange all their memories, dreams, and tenderness... before sunrise.