In Star Trek VI: The Undiscovered Country, the longstanding cold war between the Federation and the Klingon Empire begins to thaw when the Klingon leader offers a peace proposal. Admiral Kirk (William Shatner) and his crew are tasked with escorting the Klingon ruler to treaty negotiations, but they soon find themselves entangled in a political assassination plot.
Kirk and Dr. McCoy (DeForest Kelley) are framed for the murder of the dignitary and are sent to a frozen gulag planet. While they plot their escape, Spock (Leonard Nimoy) and the rest of the crew work to uncover the true assassin. The success of their mission is crucial for the future of intergalactic peace.