Yu Xia, a graduate student in the Department of Architecture, received a mysterious invitation letter inviting her to conduct architectural surveying and mapping at the century-old house "Qiyunju". The generous reward was irresistible. With expectations and curiosity, Yu Xia stepped into this magnificent building that blended Chinese and Western styles. She was instantly amazed by it, but she was also keenly aware of a lingering strange atmosphere. The strange behavior and words of the owner of the mansion, Cheng Yunshen, made her even more suspicious.
On the night of check-in, strange things happened one after another. In the middle of the night, footsteps and whispers came from the corridor. Yu Xia bravely followed the sound and found a letter from 1923 in the study. The "ritual" and "price" mentioned in the letter were like a mysterious key, vaguely opening the door to the mansion's long-shuttered secrets.
Then, Yu Xia met Cheng Yuting in the garden, wearing a cheongsam. This beautiful woman claims to be Cheng Yunshen's sister, but her unfamiliarity with modern things and the classical charm exuding in her movements seem to tell that she comes from another era. As the investigation deepens, Yu Xia gradually uncovers the unknown history of the Cheng family - Cheng Yuting was actually a person from 1923, and Cheng Yunshen seems to have used some mysterious power to allow his sister's soul or entity to survive to this day. This amazing discovery also provides answers to many supernatural phenomena in the mansion.
