The day Yeon-U’s contract marriage came to an end was also the day that she witnessed her soon-to-be ex-husband, Seon-Jae, die right in front of her eyes. But when a twist of fate has her travel 100 days back in time before the tragic accident, she decides to do everything she can to stop the accident from happening. With a second chance to make things right, Yeon-U is determined to make sure that, this time around, they get their happy ending. (Source: WEBTOON, edited)