An action historical drama depicting the story of Joseon's best swordsman Yi Nan in front of an irreversible fate.
Ban Sook, a 160 year old goblin, needs to kiss 10 times to become a human being. With each kiss, he learns a human emotion. Can a goblin who wants to be a human being and a human being who hates other human beings coexist?
Ki Moo-Hyeok, a lawyer with a high winning rate, only cares about money. Due to a murder case at a high school which he deals with, his reputation as a lawyer hits rock bottom. To regain his good name as a lawyer, he sneaks into the high school and work as a temporary teacher. He tries to reveal a secret which the students have, and gets involved with Teacher Ha So-Hyun, a P.E. teacher who loves her students. They then face the students'secret.