Psychological counselor Gu Shen has a secret: he can accurately delete people's memories through hypnosis.
This is not a treatment, it is a coverage.
For fifteen years, he has been doing the same thing - finding all the witnesses of that incident, and then using hypnosis to completely block the memory of "that day" in their minds.
Every visitor is a pawn. Their nightmares, their fears, their obsessions - are just traces of the loosening of the seal. Gu Shen's treatment was to re-strengthen the seal.
He did it perfectly. Until the sixth visitor appears.
This man sat on the hypnosis chair, looked at Gu Shen, and smiled.
"Doctor Gu, it's my turn to hypnotize you today."
For the first six hypnosis sessions, he was in control.
The seventh time of hypnosis, he was the patient.