The plot involves a peace conference between the Federation of Planets and the troublesome Klingons. The Klingons are hoping to perform a little damage control after triggering a mining disaster on one of their moons; their spokesman is the seemingly contrite General Chang (
Christopher Plummer). All negotiations abruptly cease when a Klingon vessel is attacked, and Capt. Kirk (
William Shatner) and Dr. McCoy (
DeForest Kelley) are accused of the crime. As they stand trial for murder, Mr. Spock (
Leonard Nimoy) and Vulcanian trainee Lt. Valeris (
Kim Cattrall) try to locate the real culprits. It turns out that Kirk and McCoy are victims of a conspiracy to foment further hostilities between the Good Guys and the Klingons. ~ Hal Erickson, All Movie Guide