Returning from an Imperium mission, you discover a relic of power on a nearby planet. It is your duty to investigate this relic and bring it under the Imperium's control.
Any changes made from the tabletop to the computer only add to the playability, so if you like the board game, buy the computer version, then make it known that you want an expansion.
While the plot is initially confusing, thrusting you into the middle of a war that you know little about, it goes a long way in capturing the emotion and bewilderment of a young warrior out on his first foray.