During university, Song Qian (played by Park Han-seung) was very close friends with Na Na (played by Xin Zhilei), Yu Fei (played by Li Xinyue), You Feng (played by Zhang Haoran), Hong Rui (played by Yang Fan), and Yang Zheng (played by Sun Shaolong). Everything changed when they met new student Xiao Ai (played by Zhang Tingting). The beautiful Xiao Ai created a rift in their previously tight-knit group. Especially for Na Na, who targeted her at every turn, while only Song Qian tried hard to maintain the group's relationships. Gradually, bad rumors began to spread throughout the school—Xiao Ai was seen as the embodiment of evil, and everyone who interacted with her would face misfortune. Soon, Hong Rui had an accident and injured his leg, missing an important competition. Song Qian and her friends played with a spirit-pen on the school's rooftop attic, and the spirit confirmed the ominous presence of Xiao Ai; that night, Xiao Ai jumped to her death. After graduating from university, Song Qian and her classmates progressed in their careers, with some becoming big stars and others becoming corporate elites. However, strange events began to unfold when Na Na returned from the United States, and everyone started encountering dangers. Layer by layer, the mystery unraveled, revealing that the reason behind Xiao Ai's death in college was something else entirely... In 2013 and 2010, in the city and on campus, a long-buried university story resurfaced, and a name hidden deep in memory emerged again because of the spirit-pen's arrival...
