For nearly 100 years, the planet Chrellkan IV has enjoyed a peaceful relationship with the colony on the third planet of the star system. However, relations between the two worlds take a deadly turn as a rebel colonists take over the planet and turn it against their mother world. To prevent the conflict from escalating into a full-scale war, Starfleet orders Captain Kirk in the Enterprise to moderate the dispute. On arrival, Kirks and Spock and McCoy to investigate the rebels claims. But seconds after being down, the two officers are taking hostage and then according to sensors killed. Devastated by his loss Kirk must try to learn the truth behind the mysterious Rebellion that has claimed the lives of his two closest friends.