In a shadowy old Chinese residence, Gu Qingru, a strong-willed and clever woman, returns to her ancestral home after many years away for a relative’s funeral. She only intends to fulfill her final duty as a daughter, but unexpectedly uncovers horrifying secrets behind her family’s wealth and a string of unsolved cases. Missing relatives, a murder in a sealed room, and one eerie incident after another at the residence threaten to swallow her like an abyss. Amid a struggle woven from terror and conspiracy, she meets the mysterious Lu Chenyuan. They go from suspicion to fighting side by side, and their feelings quietly take root on the edge of life and death. As the investigation deepens, Gu Qingru not only uncovers family secrets stretching back decades, but also exposes the true culprit in a deadly confrontation, securing justice for the dead and freeing herself from the shadows of her past.
