Shang Gu is the head of the four real immortals in the ancient world and the only one with pure essence energy. Because of a trial 60,000 years ago, she chose to sacrifice herself and fell into a deep sleep. She returns with another identity - Qingchi Palace's High Immortal. Despite being a high immortal, her powers are weak. Along with the loss of her former identity and powers, she also loses her memories. However, her former lover Bai Jue never forgot about her. He was the one who willingly sacrificed his reincarnation for her eternal life, and who waited for her for 60,000 years. When his soul dissipated, she vows to wait for him forever.