Termination: 1456
Internal security dispatches: do not open on penalty of death.

Summary 
From the book jacket
Termination Order 1456:Issued by Internal Security, Imperial High CommandSubject: Thought Admiral Krador zantai RrilacMission: End his command!It is suspected that Admiral Krador, a brilliant Veteran of the Romulan Wars, has been gathering forces to overthrow the Emperor.Under the direction of the Fourth Frontier Security Area Command, you and your crew aboard the warpshuttle IKS Vacsin will go to Muldor IV, penetrate Krador's stronghold, and take appropriate action against Krador and his senior officers.The mission is a vital one, though very difficult, and it must be accomplished, even at the expense of your lives.''

Background information

References 

Role-playing games