Foreign Foes (Star Trek The Next Generation, No 31)

Acting as mediator for peace negotiations between the Hidran race and the Klingon Empire, Jean-Luc Picard finds himself defending Lt. Worf from the charge of murder and a death sentence when an ambassador mysteriously dies. Original.

The Hidran race and the Klingon Empire have been at each other's throats for seventy years, and Captain Jean-Luc Picard has been asked to accomplish a near-impossible task: take the U.S.S. EnterpriseTM to the planet Velex to mediate a treaty that will end the conflict between these two aggressive species. Things get off to a rocky start, then turn deadly as the Hidran ambassador mysteriously dies, and kills a Klingon delegate in a last act of vengence.

When Lt. Worf is charged with the ambassador's assassination, and Commander Riker and Counselor Troi are trapped far below the surface of the planet, Captain Picard must not only act to save the Hidrans and Klingons from each other, but to save his Klingon officer from a hideous death sentence.