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.

Uhm Ji-won, Park Ha-seon, Jang Hye-jin, Yoon Park, Choi Ri, Im Hwa-young, Bae Woo-hee, Moo Jin-sung, Choi Soo-min, Lee Se-rang, Nam Yoon-su, Choi Ja-hye, Jung Sung-il, Son Sook, Lee Jun-hyeok