Kor.
Koloth.
Kang.

Three names which would strike fear into even the bravest of Starfleet officers. They were among the finest warriors in the Klingon Empire in the time of Captain James T. Kirk!

Eight decades later, the elderly warriors have arrived at Deep Space Nine to fulfill an oath of vengeance. They're seeking their old ally Curzon Dax, and they are surprised to find their friend looks a little different. Will Jadzia be able to help them complete their Blood Oath?