During the Republic of China, bizarre murders occurred one after another at Jiangcheng Mission Medical College. Preparatory student Lin Mo accidentally entered Room 303 of the Anatomy Auxiliary Building, which had been closed for many years, late at night. He saw strange black shadows in the four corners, and was intimidated and silenced by a mysterious man. Since then, fireworks workshops have exploded, students have fallen from buildings, corpses have floated in artificial lakes... A series of seemingly accidental deaths are inextricably linked to this abandoned classroom that is rumored to be haunted.
Lin Mo was born with a sensitive optic nerve and was easily misled by light, shadow and environment, and became the "witness" carefully selected by the murderer. With the help of assistant coach Gu Yan and retired veteran head catcher Lao Jiu, the three of them found out that all this was not caused by ghosts, but a series of murders caused by a murder that spanned forty years. Back then, four school workers were unjustly killed. Now, in the name of ghost stories, the murderer uses hallucinogenic drugs, light and shadow machines, directional sound transmission and other techniques to create terror and exact revenge.
This is a battle between reason and ignorance. When the truth is peeled back layer by layer, the ghostly shadow will eventually be invisible in the morning light of scientific evidence collection and rigorous reasoning.
