You live your everyday life without anything extraordinary happening, but this changes at a certain moment and you don't even know exactly when it started, nor why it's happening.
You live in a relatively small town where everyone, except you, started to change. These changes are both physical and mental and no one but yourself seems to be aware or concerned about the changes that occur with them. One sure factor of the changes is that, for some reason, no one wants to leave the city and, even if they wanted to and tried, whatever is causing these changes has also isolated the city making it very difficult for anyone to enter, but impossible for anyone to leave.
Who are you? What kind of changes are people going through? Are they not aware or do they just treat everything as if it is normal?