Lin Hao, a young man from Blue Star, accidentally transmigrates to the cultivation world of Tianyuan Realm. The ancient bronze mirror he carries inside him resonates with a fragment of the Heavenly Secret Mirror, sealed in the forbidden grounds of Xuanxiao Sect. At the spirit-testing stele, the awakening of his Chaos Spiritual Root sets the bells of all thirty-six peaks ringing, but the elder in purple robes, Mo Wuya, secretly plants a Bloodsea tracking mark on him. Gray mist seeps from the cracks in the ancient mirror, continually projecting terrifying prophecies of the two worlds overlapping: the countdown to Blue Star's destruction and the Blood Moon calamity in Tianyuan Realm are drawing near at the same time.
To solve the mystery, Lin Hao embarks on the path of cultivation, only to discover that undercurrents run deep in Xuanxiao Sect. The trials of the Mind-Questioning Steps reveal that the ancient mirror is actually the Bone-Illuminating Mirror, used by the sect's founding patriarch to suppress the Bloodsea Demon Venerable. Even the nursery rhyme hummed by the sect leader, Perfected Qingxu, is an incantation sealing the demon, and he himself is the patriarch reborn from a split soul. As one bizarre event after another comes to light, Lin Hao gradually realizes that Blue Star and Tianyuan Realm are two sides of the same whole. If the Bloodsea devours one world, the other is destined to collapse.
