From student to intern for Yun-bok and Hong-do, and resident to fellow for Gyeo-ul, every step forward comes with plenty of hiccups — and new learnings.

Gyeo-ul receives a disturbing noise complaint about one of Ik-jun's patients. Seok-hyeong opens up to Song-hwa, who gives him a piece of advice.

Worries about Ik-sun plague Jun-wan's ever-busy days. While watching over a patient post-surgery, Heo Seon-bin experiences a critical lesson.

An urgent case involving a liver transplant between a father and son is brought to Ik-jun's attention. Jun-wan has big news for one of his patients.

Traveling to and from Seoul, Song-hwa takes on a VIP client in need of surgery. A woman with pregnancy complications fights to keep her baby alive.

As life at the hospital goes on, the five friends' growing pains continue. Gyeo-ul is disquieted by frequent visits from a patient's mother.