The United Federation of Planets and the Klingon Empire stand on the brink of war. Captain James T. Kirk and the "Starship Enterprise"(TM) are sent back to System 7348 -- site of a previous skirmish with the Klingons -- for a confrontation with the "I.K.S. D'k Tahg" under the command of Captain Koloth.

Even as the two great ships face each other, trouble is brewing among their crews. On the "Enterprise," Lieutenant Leslie Parrish is pregnant with a half-Klingon child and must face a critical decision about her future, while Section Chief Michael Fuller still carries the wounds of the...