An American third-generation chaebol, with an attractive appearance and a devilish man who is always surrounded by people, Leon has been living a debaucherous life, seeking new stimulation. After his father's unbearable scolding, he came to an unfamiliar land of Korea and was tied down by the company, living a boring daily life. Then, he meets Woo-joo, a new bodyguard who is supposed to watch over him. The sculpted face is just his style, and his unusual atmosphere piques his curiosity, which leads him to play mischievous pranks. However, Woo-joo is not afraid of his owner, Leon, but rather does not follow orders well and even shows a ferocious attitude...!