After being frustrated in love, urban youth Liangliang (Liangzi) tries to cleanse his soul through a self-driving trip to Tibet. However, at the Kunlun Pass, a sudden severe altitude sickness dragged him into an extremely real and bizarre dream.
In the dream, the black shadow with the head of a human and the body of a snake revealed to him the ultimate truth buried by the long river of time: the universe is like a huge hourglass, reincarnating between expansion and contraction; in the 4.6 Billion-year history of the earth, they are already the fifth generation civilization. In the "Water Age" civilization of the previous generation, the sky was covered with a film of water, giant beasts were rampant, and ancestors in the form of Fuxi and Nuwa coexisted with magical creatures such as dragons and Qiongqi. A meteorite impact triggered a world-destroying flood, tectonic plates collapsed, and civilization overturned. The survivors carried out genetic modification with supreme wisdom, created a new generation of human beings, and buried the fire of knowledge - Bagua, Hetu, Luoshu, etc. - Deep in the genes of the Chinese ancestors. The so-called war between gods and demons was nothing but a brutal battle for survival between genetic creations.
Ryoko woke up from her dream, but was shocked to find that reality was intertwined with her dream: the navigation failed, the familiar mountain road became unfamiliar as if it existed forever, and in the dizziness caused by altitude sickness, the black figure with the head of a human and the body of a snake seemed to be staring at him from the car window...
He thought it was just a dream, but he didn't know that he had become the "key" connecting two eras. His consciousness is about to cross the barrier of time and space, and be completely immersed in that magnificent ancient era where gods and demons coexisted. He will personally experience the birth of human civilization in the fifth era, uncover the veil of myth, face the truth of the prehistoric era, and find his own mission and destination in the crisis of the two worlds.
