Baseball player Tae-gyu (Kim Kang-woo) and urologist Joo-young (Kim Hyo-jin) were once a loving couple, but they eventually broke up. Twelve years later, the two met again and began to believe in fate and destiny, determined to reconcile and get engaged quickly. However, at this juncture, the secrets they had concealed became a powerful bomb on their way to the wedding hall. Su-mi (Lee Yoon-hee) and her boyfriend Won-cheol (Ok Taec-yeon) have been dating for seven years. Seven years is too long, so long that they both forgot that their relationship could go further and become husband and wife. Depressed, Su-mi embarked on a journey alone, but by chance she met a man named Kyung-soo (Joo Ji-hoon). After a while, Su-mi found that she might have fallen in love again.