When transfer student Lin Xia stepped into Ivy High School, she was enveloped in the strange atmosphere of the old building. The broken glass looks like empty eyes, and the mysterious power that coexists with summons and warning follows the shadow. Gu Chuan, who seems cynical, and Shen Xingyao, who is cold and distant, cross paths with her because of rumors about a girl who committed suicide on the top floor seven years ago. When footsteps and cries reappear in the old building on rainy days, when the hot crystal pendant becomes the key to decryption, a secret exploration cooperation is about to begin. And what kind of chilling past will be revealed about the truth hidden under the mottled wall?
