Synopsis

The first day of enthusiastic newbie teacher Shen Ling at her new campus coincides with the death of a student at home. To her dismay, she soon learns that these "accidental" deaths keep happening to both the students and the teachers there, after they receive the same sticker in a mobile app. She discovers that these murders are triggered by an incident from a year ago and the mastermind pulling the strings is someone she least expects.

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