 The Enterprise transports Elaan, the female ruler of the warrior Troyians, to the planet of her enemy so that her arranged marriage will halt their interplanetary war. Kirk must teach the arrogant, vicious ruler the ways of polite society but falls victim to the legendary weapon of Troyian women: their tears act as a love potion. Spock tracks what may be another ship shadowing the Enterprise and Kirk, distracted by Elaan, must fight against other parties interested in preventing the Federation s peace efforts.