On a Klingon world near the frontier, the natives begin to rebel against their Klingon masters, led by a mysterious man named "Shadowheart". Meanwhile, the USS Enterprise-D crew mourns with Worf for the death of his brother, Nikolai Rozhenko, killed defending the colony he lived at. Jean-Luc Picard learns that "Shadowheart" may indeed by Rozhenko, and dispatched Worf and Riker. Gowron sends Worf's brother Kurn to join them on their mission.
- Captain Jean-Luc Picard
- Commander William T. Riker
- Lieutenant Worf
- Commander Kurn
- Nikolai Rozhenko (aka "Shadowheart")