Based on the manhwa Temper My Blade, the story takes place in a fantasy historical setting.
After his family is murdered by Demons 10 years ago, Yue Jue is trained by his celestial master Ji Kongying. This is in preparation to become a sheath to his blade, whilst he would like to become a blade himself. Yue's progression whilst his affections towards him grow. Missing people are linked with demons in the area and Luoyu knows from memories contained in his blood that Yue has the essence of Tai Chu, a large golden dragon within him.
In order to get revenge for his family, he’ll need to…listen to his master?! The master combs his hair, tells him what to wear, and in return, requires him to be obedient as his living weapon.. and more.