In a small town in the south of the Yangtze River at the beginning of the 20th century, a "grey fog" that could swallow up time suddenly appeared. Zhou Mobai, a physicist who returned from studying abroad, discovered that there was a tunnel connecting parallel time and space hidden under the old house while investigating the mysterious disappearance of his sister. When he uses modern science to measure the secrets of the ancient witch clan, and when quantum entanglement encounters the separation between yin and yang, a battle of redemption and destruction across dimensions quietly begins. In this world full of Lu Xun-style cold criticism, can the glimmer of humanity penetrate the cracks in time and space?
