Inspired by Critical Eleven by Ika Natassa. Tells the story of love and marriage between Kim Jong Kook and Song Ji Hyo. These two people who love each other have to face the biggest tragedy of their marriage when Kim Ae Jung, their baby in Ji Hyo's womb, passes away. Grief over Ae Jung's departure creates distance between them, and ultimately, threatens Jong Kook and Ji Hyo's happiness as a family.