On Qingming Festival, Liu Qinan accompanies his classmate Li Xiaolin to a cemetery. By chance, he finds a phone that can connect to a password-free “Cemetery Wi-Fi.” The story on the “Cemetery Wi-Fi” webpage eerily matches his own experiences, and a “tombstone wall” even displays a countdown to Li Xiaolin’s death. Thinking his rival Wu Peng is playing a prank, he changes the name to Wu Peng’s, unaware that the phone was discarded by Li Xiaolin, who had already seen her name on the list and noticed something wrong with her body. Later, Sun Laosan dies horribly after his name is changed. Qi Luyu admits she used the Wi-Fi to cast a curse as revenge against Wu Peng and Li Xiaolin. In the end, Liu Qinan risks everything by entering his own name, breaking the curse. Though they have all faced life and death, they ultimately walk together toward the light.
