Nam-kyung and Yi-young find themselves in the middle of two competitive professors. Sa-bi endures an abusive superior but finds solace in a kinder boss.

While trying to keep her relationship with Do-won secret from the hospital, Yi-young gets hands-on OB-GYN experience with a demanding professor.

As their first year nears its end, the residents face the hospital's never-ending bustle — especially Yi-young, who finds herself at a crossroads.