200 years ago: The expanding Klingon Empire found a frozen world rich in deposits of the mineral topaline. They named the planet taD - Klingon for "frozen" - and they called the people jeghpu'wl' - conquered.
Four years ago: The Klingon Empire invaded Cardassia, breaching the Khitomer Accords and causing a break with the Federation. On taD, depleted Klingon forces were overthrown in a small coup d'etat, and the victorious rebels took advantage of the disruption to appeal for recognition from the Federation.
Now: The Klingons have returned to taD and re-established their control. But the stubborn rebels insist on Federation recognition. A solution to the diplomatic impasse must be found, a task that falls to the Federation's new ambassador to the Klingon Empire - Worf.
Worf thinks of himself as a fighter, not a negotiator, but the Federation disagrees. Now, for the sake of the Federation and the Empire, a Klingon warrior must weave a fragile peace out of a situation ripe for war!