1623, the 15th year of King Gwanghaegun's reign, King's loyal servant and legendary archer, General Choi Pyong-ryang, is framed for treason and gets executed. His entire household meets the same tragic fate but his young son and daughter, Nam-yi and Ja-in, escape and flee to the safety of their father's longtime friend, Kim Mu-seon's home. The brother and sister take refuge under Kim's wing and are raised as his own.