More than 400 men and women serve aboard the USS Enterprise. These are the best of the Federation, men and women of exceptional courage and skill. But not all of them can be trusted.
Captain James T. Kirk and the crew of the “Enterprise*” investigate a mysterious power source emanating from a planet supposedly populated by a race of primitive humanoids. Suspecting a Klingon plot, Kirk beams down to the planet with Dr. McCoy and a team of security officers. But Kirk is in more danger than he knows–a Klingon infiltrator watches his every move, biding his time to strike.



