Yang Tianwei, a Chinese teacher, recognizes his middle school classmate, Shi Tianya, in the portrait of a female painter on an art exhibition poster. They shared a secret society in school, but it ended tragically when Tianya jumped from the "Phoenix Tower." Now, Tianwei wonders if the painter is Tianya's ghost or if his memory is mistaken. Determined to uncover the truth, he reaches out to the painter and seeks out their former secret society members.
