This is the Gorn versus Romulan SFB scenario from Captain's Log #6. You play the Gorn admiral in a CC heading for a negotiation with a Romulan admiral in his waiting Sparrow Hawk A+, who wishes to negotiate a separate cease fire & peace for his surviving fleet. Gorn HQ sees this as a perfect opportunity to capture the Romulan admiral, but he may have similar designs on you. Romulans can never be trusted!! The area has been thoroughly sensor swept for a week and only the Sparrow Hawk A+ emissions & presence can be detected.
It is an SFC 1 scenario rated as "Bloody Difficult" to win. I've managed to beat it once in 6 games, successfully capturing the Romulan Admiral and his ship.
If you have a copy Captain's Log #6 you'll already know the scenario. It's too much to type here so just read the mission briefing in the game before starting.
I will consider posting a SFC 2 version if someone demands it and possible a multiplayer version too.
I am also working on another version of the same scenario where the mission is played from the Romulan perspective.