Prince Ji Yu meets Long Yang who, in order to prevent him from murdering a group of peasants, steals his bow and tries to flee with it. However, Long Yang is caught by the guards but forgiven by Ji Yu, who is moved and impressed by the boy's actions. Before leaving, Ji Yu gives him a token so he can exchange it for some money, but Long Yang decides to keep it. 10 years forward, Long Yang has been serving as a guard in the palace for 5 years without Ji Yu noticing him. One day, when Ji Yu returns from a battle he is attacked and Long Yang is mortally wounded trying to protect him. Just before losing consciousness, he sees how an arrow is fired at Ji Yu, possibly killing him as well. Upon awakening, Ji Yu discovers that he has returned a year ago in the past. Seeing an opportunity to change the future, Long Yang reveals his identity to Ji Yu, who recognizes him thanks to the token. Long Yang soon becomes the personal guard of Ji Yu, and a candid romance flourishes between both men.