He is the son of a fallen country squire. The hardships he endured as a child made him stubborn and cunning, and he is determined to unravel every mystery, all because a "curse" has left his body weak... She is an ordinary college student with an extraordinary gift for psychology, despite having no interest in the subject she majors in. After she secretly photographs someone in the library, she gets entangled with him, an eccentric upperclassman. To investigate the "curse" afflicting him, he lures her to his hometown under the pretense of a research internship. There, she gets caught up in his efforts to find the real culprit who nearly wiped out his family decades ago. From the eerie stares that follow her everywhere the moment she arrives in the village, to his grandmother's and the villagers' strange behavior toward him; from his grandfather's vanished grave to the shadowy figures wandering the village at night; from the secret hidden in the ruins of the Li family's ancestral home to the mummified corpse concealed in the Li family watchtower; from the Li family's bizarre history to the matter of the "curse" that haunts them... Everything here grows more baffling and uncanny after his return home. In pursuit of a happy life, people can reveal their ugly side. We call that human nature.
Humans are truly greedy, and their hearts are utterly wicked. A conspiracy killed an entire family; those people were all murderers. Why are people so evil? It can only be said that humanity has been extinguished and morality has declined.