Quote: "But just after all the enemies are killed, I want to activate story zone and then immediately win zone. I mean I don't want to place the story zone to a certain place, I want the video I prepared to play just after all the enemies are cleaned up.
How can I do this? "
There are a variety of methods you can use to achieve this, depending on your map layout. There is a command (video=x") which allows a video to play and you do not need a story zone.
Method 1:
You can use a variable to track how many enemies were killed. When the value is reached to what you want, the video can be played.
Method 2:
If the player is battling enemies down a corridor, you can script the final enemy the player would reach to run the video once it was killed.
There are other methods, some more complex, but that gives you an idea.

Twitter: @NFoxMedia