AN

Yoon Seo-yeon, a brilliant but stubborn first-year neurosurgery resident from a modest family, has a one-night stand with Han Ji-hoon, a wealthy, confident final-year neurosurgery resident from a prestigious family of doctors. They barely know each other, and Ji-hoon still has unresolved feelings for his wealthy ex-girlfriend, Hye-rin. Three weeks later, Seo-yeon discovers she is pregnant.