Luo Yi, a nineteen-year-old sunny boy, worked hard to get admitted to the art university of his choice. However, on the day he received the admission notice, his family collapsed - his father was defrauded and owed two million in loan sharks. The cold-blooded relatives forced him to drop out of school and force him to marry Lin Wan'er, a wealthy girl, to pay off his debts. Luo Yi tore up the notice and left home angrily. In his desperate negative emotions, he accidentally activated the portable demon that was sleeping in his body.
The Demonic Abyss has the unparalleled ability to devour all things, evolve demons and weapons, and transform energy. Luo Yi has started a double life since then: during the day, he is an ordinary delivery boy who shuttles through the streets and alleys of Jiangcheng. At night, he transforms into a rookie demon, devouring energy and refining the demon core to earn his first pot of gold. He successively slaps the face of the arrogant Lin Waner and the arrogant second-generation rich Li Hao.
As his strength increases, Luo Yi gradually becomes involved in the dispute between two mysterious forces: the Shouyuan Society, which has monitored the holder of the Demon Abyss for generations and regards him as the "out-of-control demon lord", and the Dark Star Organization, which is bent on seizing the Demon Abyss and trying to resurrect the ancient demon. During the final siege of Jiangcheng, Luo Yi broke through the realm at the critical moment of life and death in order to protect the people around him, awakened the world-purifying demon pupil, and severely injured Xuan Jizi, the great elder of the Shouyuan Society, and Ye Ying, the second-in-command of Dark Star...
