In the Qingxuan Continent, there are thousands of races, and martial arts are respected. Zheng Jiuyou, a young man, was born with a unique Jiuyou pulse. He was regarded as a loser and was ridiculed. He has a withdrawn and cold personality, but is actually cold-faced and warm-hearted. His only relative, his sister Zheng Xiaoyao, is poisoned by ancient cold poison and her life hangs by a thread. In order to save his sister, he had to enter the Tianxuan Sect, which is famous for its cruelty, and compete for the approval of the tower spirit of the "Burning Sky Demon Suppression Tower" which is said to be able to suppress evil spirits throughout the ages.
However, what is being suppressed in the Demon Suppression Tower is not the good ones, but the Nine Infants, the Lord of Demons who was sealed by the gods in ancient times! Jiuying uses the tower spirit as bait to lure the testers to kill each other. Every hundred years, it can absorb thousands of resentful souls and attack the seal. The moment Zheng Jiuyou stepped into the tower door, he discovered a shocking secret: the cold poison in his sister's body was actually the "seed" dropped by Jiuying through the seal, in order to cultivate a perfect container in the human world for him to seize.
On the night of the blood moon, a group of monsters are waiting around, including the mysterious man in black, the hidden chief of the academy, the remnants of the monster clan who come for revenge... All the forces are engaged in life-and-death games in the arena. Zheng Jiuyou unintentionally awakened the "Swallowing Heaven" soul mark of ancient gods and demons sleeping in his blood, which can swallow the essence of all things and turn it into his own use. From a waste that everyone despises, he gradually reaches the pinnacle of martial arts, and the shocking prophecy about the resurrection of the Nine Infants is gradually approaching with his awakening...
