Fire and Ice (Star Trek)

The USS Excelsior, trying to stay under the Empire's radar, has entered a mineral rich asteroid belt. A lone scout fighter is deployed to harvest the minerals in the target asteroids. Taj-class Klingon birds-of-prey are suddenly detected inside the asteroids and the fighter is ambushed, forced to battle the Klingons. All six asteroids are eventually harvested and the scout returns to Excelsior, only to have the ship attacked by fighters and then a K't'inga-class Klingon battle cruiser, IKS Gr'oth. After a brief battle, the ISS Renegade arrives and the Klingons are driven off. The Renegade escorts the Excelsior to Starbase 9 for repairs.