Everything was just like today we are living at. Everyone was normal human beings running and working hard to get good jobs, good marks, good universities, etc.
Every single time was passing with lots of remarkable things in every person's life.
But....
one night something happened that can't be expressed by anyone. It changed everything. Even the way our earth was. Feels like a new world is created. Every people changed, their way of living changed and their life changed completely. A new world began to start with everything new included lifestyles of every person and creature.
The world changed within a night when some were sleeping and some were doing work. But there were some people who looked familiar with the changes or we can say they looked experienced with those changes. This seemed mysterious. Some people are known to everything even those complete changes.