Marriage life is not as easy as it seems, isn't it? Sometimes great things can become the greatest downfall.

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.

The first week of August. That's the last day Jong Kook met Ji Hyo, and the last day Ji Hyo saw Jong Kook and their heaven daughter, Ha Neul. But what if one day, four years later, they get reunited? Will Jong Kook and Ji Hyo get back together? Will Ha Neul, their seven years old daughter accept her mother? Will they become a family like they were once?

Kim Jong Kook and Song Ji Hyo was once a loving couple, but an incident happened and now they're getting a divorce. Will they be able to forgive each other? Moreover if Ji Hyo came up with a deal: Twelve Kisses Deal