Captain Kirk is framed for the assassination of the Klingon head of state just as the Federation is about to make peace with their old enemies. As Kirk and Dr McCoy are banished to an icy prison planet, Spock tries to uncover the identity of the real killers. Sci-fi adventure sequel, with William Shatner, Leonard Nimoy, DeForest Kelley, Iman, and Christopher Plummer, with appearances by Christian Slater, and Michael Dorn from Star Trek: The Next Generation