Chen Qing'an, a medical apprentice who has restrained himself and returned to etiquette, appears gentle and humble, but inside he hides a ferocious beast that can never be fed. Ten years ago, he followed his master into the mountains to collect medicine, accidentally entered an ancient ruins, and obtained a mysterious "Abyssal Bone Jade". This jade can swallow the souls of monsters and transform them into pure spiritual power to help him practice. However, he didn't know that there was an ancient soul sleeping in this piece of jade.
Ten years later, the master disappeared unexpectedly, the hospital was occupied, and Chen Qingan was forced to leave. Before leaving, his most trusted friend, his fellow disciple Zhao Mingxuan, said on the surface that he would share the joys and sorrows with him, but secretly colluded with local powerful men to stab him in the back and take away the only healing elixir and travel expenses he had. Chen Qingan was seriously injured and forced into a desperate situation and had to flee into the mountains.
In desperate situation, he awakened the ancient soul in the Yuan Bone Jade - an ancient demon named "Yuan". Yuan told him: If you want to live, you must learn to eat people. It's just that this "eating" is not eating flesh and blood, but devouring other people's cultivation, talent, and luck. Chen Qingan didn't want to become a monster, but found that this world never left a way for good people to survive.
He gritted his teeth, started from the lowest level of demon hunter, and embarked on the path of cultivation step by step. Underneath his kind appearance is an increasingly crazy desire for control. What he wants is not just to become stronger, he wants clues about his master, to expose Zhao Mingxuan's true face, and to make everyone who betrayed him pay the price. But he didn't know that the being in that piece of Yuan Gu Jade was not a kind person. And hidden in his lost memory is an abyss far deeper than betrayal.
