First-year OBGYN residents at Yulje Medical Center navigate the chaos of their work and personal lives, all in their quest to become exceptional doctors.

Every day is extraordinary for five doctors and their patients inside a hospital, where birth, death and everything in between coexist.

A young girl named Hye-Na is abused by her mother, Ja-Young. Although she is not okay, she tells other people she is alright. Soo-Jin is a temporary teacher at the elementary school where Hye-Na attends. Soo-Jin is aware of her situation and decides to become her mother.