Guodong, an orphaned girl of the Qingfeng Sword Sect, is regarded as a good-for-nothing with tri-attribute mixed spiritual roots, yet possesses a once-in-ten-thousand-years Myriad-Phenomena Unification spiritual root. During a crisis in the sect trial, her spiritual root unseals, also awakening Xuanyuan, the ancient demon lord who guards her. She is dotingly pampered in every way by her four senior brothers, yet gets embroiled in a thousand-year chess game laid out by the extraterritorial lord. Su Qing falls into demonic corruption out of jealousy and becomes a pawn, and everyone gradually uncovers sealed secrets, with Xuanyuan bearing the infamy of betrayal while actually risking his life to protect his master. On the night of the lunar eclipse, destiny erupts, Guodong's prime god memories loosen, and immortals and demons fight side by side against extraterritorial conspiracies, staging a protection and deception spanning eternity.