It is adapted from the "Seven Fairies Poison Murder Case" in Jinghai No. 1 Middle School in 1988.
In the morning, Yang Xi woke up and found that her roommate had turned into three scattered corpses, foaming at the mouth and stiff limbs.
There was an empty poison bottle at the crime scene with only his fingerprints on it.
"Am I really the murderer?"
Acquitted on the grounds of mental illness, Yang Xi re-entered a new high school three years later.
The head teacher of the high school and the male teaching assistant who came to the Normal University for internship seemed to be inextricably linked to the past. They approached Yang Xi to discover the truth of that year.