Ian Wyndham (Paul Nicholls) and his girlfriend Samantha Andrews (Jennifer Love Hewitt) are like any ordinary couple, busy with their lives every day, with little time alone. After a quarrel, Peter, who came to apologize, hesitated whether to get on a taxi, because of this hesitation, his girlfriend chose to leave. In less than a minute, the taxi collided with a truck at the front intersection, and his girlfriend died. The grief-stricken Peter woke up the next morning and found that he had returned to the previous day. His girlfriend was safe and sound, and everything developed according to the established steps. If it happens again, Peter dared not think about it. He put down all his business, climbed mountains with his girlfriend, walked, talked to each other, and loved each other. On that decisive night, he got on the fatal taxi without hesitation, and leaned over to protect her when the fatal blow came. If it happens again, he will love her with his life.