After receiving a call from an unknown number, Lin Mo is drawn into a series of eerie events linked to his aging apartment building. Though it’s said to have only twelve floors, he begins seeing signs of a hidden thirteenth—and a strange contact named “13F” appears in his phone.

The story of this book revolves around the protagonist Li Ran, who, in the process of searching for his father’s belongings, uncovers a secret about memory, curses, and loss. The tale begins when Li Ran discovers a roll of undeveloped film, a copper mirror, and an ancient photo album left behind by his father. As his investigation deepens, Li Ran discovers that his father’s photography studio, "Yiguang Photography", is the center of this secret—a place that serves both as a cemetery of

This book tells the story of Lin Xue, the protagonist, as she searches for her missing sister, Qing Qing, gradually uncovering the supernatural secrets hidden in an old apartment building. The novel combines psychological thrills with urban supernatural elements, weaving a tale of suspense and emotional entanglements through mirrors, elevators, changing floors, and the intertwining of reality and memory.

This novel is a psychological thriller laced with urban supernatural elements, centering around the protagonist Qiao Yu, who becomes entangled in a bizarre “crying incident” after moving into an old, decrepit apartment building. Beneath the seemingly ordinary facade of daily life, everything begins to point toward the mysterious death of a woman named Li Mengyao.

Xu Yan, a solitary woman, returns home from work one night to find her front door key already inserted into the lock. At first glance, nothing seems amiss—until she notices the slightly shifted angle of a cushion and a coffee cup in the kitchen that doesn’t belong to her. These subtle anomalies mark the beginning of a psychological invasion meticulously designed just for her.

In a quiet little town, a late-night radio show receives a chilling call. The caller’s voice is cold, mechanical, repeating the same haunting phrase: "I’m dead. I’m in the water... They won’t let me leave." The eerie recording is uploaded online, quickly going viral as an urban ghost story and capturing the imagination of countless netizens. But a cryptic comment from a reservoir caretaker reveals a grim truth—the voice belongs to a man who drowned in that very reservoir five years ago