A futuristic world where robots have become popular, Tae-pyeong is possessed by a robot body in an unfortunate accident. He meets Nana, whose life is threatened by her evil uncle, who killed her brother to take over the company. The story of a robot who sacrifices his entire body to protect a child in danger.

To escape an arranged marriage in the Dragon Palace, Kim Yong-man, the dragon king's daughter, flees to the human world and begins high school, determined to become the top of her class. There, she encounters Shim Hae-soo, the current number one student sitting beside her. As rivalry shifts into friendship, the two gradually become special to each other.