In the era of the Wen clan's tyranny and people's suffering, the masters of the great immortal cultivation clans: the Lan Clan of Gusu, Jiang Clan of Yunmeng, Jin Clan of Lanling, and Nie Clan of Qinghe, joined forces in the "Sunshot Campaign" to defeat the Wen Clan. The Yiling Patriarch, Wei Wuxian, made great contributions to the campaign, but his path of cultivation, labeled as demonic, was so powerful that he was slandered and scorned by the people. In the end, his lair in the Burial Mounds was destroyed by the very clans he fought with.

Thirteen years later, Wei Wuxian is summoned into the body of a lunatic who was abandoned by his clan and family, and is found and taken away by a famous cultivator among the clans-- Lan wangji, who is known for his genius in conventional cultivation, and frequently fought with Wei Wuxian in his past life. Wei Wuxian tries to leave without revealing his true identity, but for reasons undecipherable to Wei Wuxian, Lan Wangji refuses to let him go.

As they pursue the elusive mysteries of the past, the relationship between Wei Wuxian and Lan Wangji changes and grows. The cheerful, unrestrained Wei Wuxian and the calm and disciplined Lan Wangji, the story of the two begins with their childhood encounter...