It tells the story of a young girl named Nan Yan who enters the world of immortals to save her mother and accidentally forms a fateful bond with a "heart lock." The story revolves around Nan Yan, a skilled doctor who is forced to embark on a journey in the world of immortals to save her mother. Adapted from the web novel "Wo You San Ge Long Ao Tian Zhu Ma" (我有三个龙傲天竹马) by Yi Dai Xue (衣带雪).