To Oh Yeonah, money means everything. Her top priority is money, and her only interest is managing that money. Her life seems to go perfectly well until she loses her entire asset to her boyfriend who turns out to be a conman. During the process, she crosses paths with the goblin, Bansuk, and, being completely broke, she signs a contract with the Goblin Queen to live in their house and receive wages in exchange for maintaining the secrecy and helping Bansuk complete his mission. The mission is to kiss ten humans that the Queen chooses and obtain ten human emotions to ultimately become human. Will Oh Yeonah be able to help Bansuk successfully accomplish his mission?