Oh Hyun-jin is the youngest executive at her company. She gives birth to a baby and stays at a postnatal care center. She is the oldest guest at the center for mothers and their newborn babies. While staying there, she meets other women, including Jo Eun-jeong, and they grow together as adults.
Driven, career-focused Oh Hyeon-jin’s happiness at her new promotion is complicated by the discovery that she is pregnant in her 40s.
Hyeon-jin meets an adversary at the birth center and proceeds to engage in a battle of nerves with her. Hyeon-jin’s husband gets some advice.
Wearied by her maternal duties, Hyeon-jin seizes an opportunity for a temporary reprieve. Later, she must make a decision.
Hyeon-jin wakes up after having fainted and has a revelation regarding the breast-milk thief. In her absence, she begins to feel unimportant at work.
With her husband acting fishy, Hyeon-jin worries that she's become less desirable after giving birth. The appearance of a shabby man causes a commotion.
An unwelcome visitor makes Hyeon-jin nervous about her job. Can she beat the competition to a top babysitter so that she can return to work?
Park Yun-ji suggests a name for Hyeon-jin’s baby that leads to a hidden truth being revealed. The women are shocked at how Lee Lu-da has changed.
Hyeon-jin goes to talk to her boss about a big decision. Cho Eun-jeong lies to avoid a misunderstanding regarding her relationship with Ha Kyeong-hun.
