In the rebellion building of an old factory deep in the mountains, an old teacher welcomed back his son who graduated from college, his daughter-in-law whom he had never met, and a warm-hearted young man. They were originally a harmonious and happy family, but they accidentally fell into a strange and confusing incident. Is there any other reason for the old teacher's unexpected stroke and death? Why did the calm and capable son point a sharp knife at his filial daughter-in-law? Who was that young man? Why has he become a key figure that cannot be ignored in the whole incident? The blood of snakes is cold, and so is the human heart.
Concept: The human heart is more terrifying than ghosts and gods