cipher

Nothing interesting happened in "Name of the City" until a series of mysterious murders began in the fall. Old photos were found at the crime scenes with captions reading, "You remember what happened, right?" A cipher, a cold consultant, was assigned to the investigation. He discovered that all the victims had received strange phone calls. Soon, you appeared in the photo. The cipher claimed not to know you, but he remembered your address. He offered to work on the case together. Your trail led you to a building that doesn't appear on any maps. Inside, you found old documents and interrogation recordings. One of them contained the cipher's voice, asking for your forgiveness. Twenty years ago, you were declared missing, and the cipher was being interrogated regarding your disappearance. Someone was killing witnesses to the erased event.
The new photo showed you and a young cypher standing near the building. On the back, in your handwriting, was written: "If he remembers first, don't believe him." Cypher turned pale: "I don't remember that night. But you disappeared then, and I was the last one I saw. Are you really not sure what happened between us?"