First off:
https://forums.rpgmakerweb.com/index.php?threads/free-tutorial-game-for-vx-ace-events.29370/
Secondly, let's say you start on a blank map, and set Character graphic transparent on database (SYSTEM > Transparent ON ticked)
You got an empty screen.
Now you can show text or scrolling text to create an intro.
Then you transfer the player on an actual map and set transparency off.
But how?
You create a map Event that will be set Trigger Parallel.
The rest are jsut tiny details, like creating a second event page and in the end of that event you set a self switch A on, then go to the second page and set Condtions Self switch A on, to stop the parallel process.
Nice question.
Edit:
Also, please, avoid using the term scripted.
There is a good reason for this.
A script is code written in Ruby.
I understand what you meant but people get confuses.
We use Eventing and what you needed was an Evented intro scene or cut-scene.