Karma.

An enthusiastic newbie teacher, Shen Ling, encountered a series of death accidents after entering the campus. The students who seem to have both good academics and good looks have a horrible evil character. After a long period of shortcomings, one after another killing incident happened. The teachers and students continuously died in the same pattern of sticker they received in communication application. All the murders are triggered by an incident from a year ago. Shen Ling will find that behind the case, there is still a cruel truth, a heavy price that no one can bear…