I stumbled across this one a couple days ago
It's a Star trek story, that starts as Kirk and the Friends are finishing their last joyride in the Enterprise A before returning the ship for decommissioning (so just after ST6: The Undiscovered Country)
https://www.fanfiction.net/s/11703999/1/One-Good-Man
Blurb: On her final cruise, the Enterprise-A encounters a damaged ship filled with refugees and captained by Mirror Universe Khan Noonien Singh.
It's a Star trek story, that starts as Kirk and the Friends are finishing their last joyride in the Enterprise A before returning the ship for decommissioning (so just after ST6: The Undiscovered Country)
https://www.fanfiction.net/s/11703999/1/One-Good-Man
Blurb: On her final cruise, the Enterprise-A encounters a damaged ship filled with refugees and captained by Mirror Universe Khan Noonien Singh.