If you liked the first Die Hard movie you'll get an idea of the structure of the story. There is even a quick reference to the movie.
Jimmy is a young man who has been allowed to work on a new first-person shooter by a friend. He is allowed to create textures for the game, after hours at the office. One day he gets engrossed in simply playing the game in its "alpha" phase. He loses track of time and when he finally stops he discovers that the office is taken over by armed thugs.
What follows is a cat and mouse situation where Jimmy just wants to get out of danger. But then the circumstances change.
The story was a stand out in the collection.
Micky Neilson's website - http://www.mickyneilson.com/