Lin Yan, a restorer of ancient books, accidentally travels through time and space to the Xuan Yuan Continent on a stormy night, where he meets Qin Yue, a disciple of the Qingmu Sect, and follows him into the sect to begin cultivation. After enduring three trials in a secret realm, Lin Yan obtains an ancient inheritance and breaks through to the early Foundation Establishment stage. Upon returning to Earth, he discovers that Earth also has hidden cultivators. He takes on the mission of protecting the Xuan Yuan Secret Record and maintaining peace between the two worlds, becoming a guardian who connects both realms.