The play is a time-travel drama about the sincere friendship and growth story of the two men, Zheng Lu, who was originally a courier on the national archery team, and Lin Ji (pronounced as Ju) in the Joseon Dynasty. Jiang Zhihuan plays Zheng Lu, who was originally an archery player and now a courier. He and his proud sister and his first love who reunited after 8 years, the two women in his life, traveled to the Mingzong era of Joseon together, and their lives were constantly threatened. Jing Shouzhen plays Li Haidun, a doctor in the emergency medicine department. She is the only daughter of a wealthy family. She has been an intern in the emergency medicine department of the best university hospital in South Korea for three years. She is elegant and tasteful but a little arrogant.