Follow Up to She's Not Dead

To recap my high school math teacher went missing and at my reunion i found a coded letter like hte ones she used to give us. Seven others have also found these messages.I looked ny gang from high school all seven others not believing they had all been handed the same code, we needed to figure this out fast before something else happened to change what we had.
" So now that we all know what these are how do we decode them," Ben questioned.
"Not sure but I bet it has something to do with the decoders we used to have for her class," I said.
We found our decoders and decoded the message, it read ' meet @ old warehouse 9:00 alone if you bring the police she will die. That scared us strait.
That night we went to the warehouse to find here chained and tortured feeling bad for her so I reached out to her and ......................................that's when I woke up.



picture from here