An adaptation of the 2012 fantasy-danmei web novel of the same name by Priest, the series was released on the video platform Youku between June 13 and July 25, 2018.

[1][2] The series follows Zhao Yunlan (Bai) and Shen Wei (Zhu), a detective and a professor who investigate supernatural phenomena.

[3] That same month, Guardian was pulled from Youku amid a crackdown on "harmful and vulgar" internet content,[4] but was later re-uploaded.

During that war, the Haixing and Yashou were led by the hero Kunlun, who became a close comrade to the Black Robe Envoy, the leader of a faction within the Dixing that sought peace.

[9] The opening song, We Won't Be Falling was produced by an American team for the drama,[10] with a performance by the Budapest Art Orchestra.

[3] The series was re-uploaded to Youku on November 10, 2018 with some scenes re-edited or deleted,[5][16] receiving over 52 million views in the first seven days of its re-release.