Once rivals in school, two brilliant doctors reunite by chance — each facing life’s worst slump and unexpectedly finding solace in each other. Burnt-out doctors run into each other again during the lowest moments of their lives, and their reunion may spark an old rivalry or ignite a new romance. While Jeong-woo awaits an answer from Ha-neul, she contemplates an opportunity abroad, and he anguishes over the fate of their relationship.