Cheon Ha-Jin was an assassin of Divine Justice Alliance and is one of the Ten Great Masters. He was known as Dam Sa-Yeong's faithful hunting dog. He was later killed by Gwak So-Gyo, the Queen of Soaring Beauty. After dying, Cheon Ha-Jin reincarnates to the body of Seo Ryang, the third prince of the Heavenly Demon Cult and a student of the Demon Lord, who fell victim to qi reflux and spent six months in a coma.