The story takes place in a century-old house in contemporary southern China, integrating the architectural style of the Republic of China and the legacy of feudal clans. Under the surface of the real world, there are supernatural rules such as "yin debt", "blood sacrifice" and "soul contract" based on local folk beliefs. Supernatural events are driven by family sins and obsessions. They are not chaotic horror, but the embodiment of karma. The social structure still retains the remnants of the clan elder system, providing practical resistance for the heroine to resist traditional authority.
Purpose: Face the sins of the clan and break free from the shackles of pain brought by fate. The heroine does not blindly follow ghosts and gods, uses reason to pursue the truth of old injustice cases, and learns to trust and love each other in the darkness. Expose the darkness of human nature in feudal clans, complete self-salvation, and justice will eventually pay off to the wronged souls.