Yang Zicheng, an ordinary high school student, received an email from an unknown source on the last day of summer vacation. Following the guidance of the email, he witnessed the scene of a murder. Around this email, he met Sylvia Lin, a girl who calls herself a "retrospector," and was involved in the huge conspiracy behind the incident.
This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.
