The ancient demon king Dongfang Qingcang, who had been suppressed for a thousand years, returned to the Three Realms. Once he was resurrected, he set off a war between immortals and demons, but he was seriously injured by the God of War Jiuyuan because his spiritual power had not yet recovered. In order to escape, the demon king exchanged souls with the fairy Xiao Lanhua under Siming's seat, but Xiao Lanhua, who had difficulty controlling her magic power, accidentally killed her own immortal body, and the two fell into the dilemma of sharing a body. In desperation, the two embarked on a journey to find a new body. Along the way, the two experienced all kinds of things. During the fights, Xiao Lanhua secretly fell in love with Dongfang Qingcang, but she didn't know that Dongfang Qingcang at this time only regarded her as a tool to revive the ancient god of war Chidi, and under the calm, a bigger conspiracy was quietly going on...