They say that babies are the most precious gift from heaven. How can a couple stuck in an almost loveless marriage survive the chaos of raising a child and being a parent? How can they manage the turmoil caused by the unexpected event?

Donghae and Yoona have an agreement that they will be faithful to each other which means, no scandalous affair or whatsoever. Both of them think that they can survive their loveless marriage. They didn't want their parents to die from instant heart attack if they divorce.

They are living along well. They are living under the same roof but do things separately. No intimacy and no romantic thing involve. Purely business as if they are really strangers. Their families keep on reminding them to produce at least three heirs but they are not entertaining the thought. But how can a newborn baby change their life and tumble it upside down unexpectedly.