In ancient times, the heaven and earth were first opened, and the three realms of gods, humans, and demons were separated. Prince Changqin's soul was separated due to the changes in Buzhou Mountain, and half of his soul was cast into the Fenji Sword, causing many causes and effects. The young man Baili Tusu is burdened with the evil spirit of Fenji, and embarks on a journey to find out the mystery of his life experience and the truth about the genocide. During the journey, he met Su Ying, Ouyang Shaogong, Fang Lansheng and others. The fate of everyone was intertwined, and they struggled to make a choice between love, hatred and the righteousness of the world. The dispute between immortals and demons is intensifying, and the people are facing catastrophe. Can they turn the tide and protect the peace of the world? Let's take a look at "The Legend of Ancient Swords and Legends of Immortals and Demons Against the World" to reveal a thrilling legend of immortals and heroes.