Han Young Min (Lee Jung Jin) and Min Seo Young (Oh Seung Hyun) were engaged to be married; however, Young Min's ex, Jae Hee (Kim Yoo Mi), dumped their son, Jun, on him. Seo Young broke up with Young Min afterwards because Young Min refused to send his son back to his mother. Jo Mi Soo (Lee Yoo Ri) befriends Young Min and helps Young Min adjust to his new life with his son. Young Min and Mi Soo soon realize their feelings for each other and plan to marry. However, obstacles stand in their way before they can do so.