A story about three friends who just turned twenty; an age where you can do whatever you want, love whoever you want with opportunities abroad.

When Han Suk-Hoon was little, he was adopted by a family in the United States. He returns to Korea as an adult and works as an excellent surgeon, but he falls into a bottomless pit. He succeeds ...

Amid a tense inheritance fight, a charming heir clashes with his hardworking employee who's known for her irresistible smile — which he cannot stand.