In the second add-on to Wing Commander, everything seems quiet at first. The Tiger's Claw is stationed in the Firekka system. The Firekkans are bird-like aliens who are applying for membership in the Confederation, with the Tiger's Claw watching over the diplomatic negotiations. Things change when huge Kilrathi fleets appear near Firekka. Even though the system has no military value, the Kilrathi are pulling fleets from other systems, all of them heading for Firekka. The Confederation is puzzled, until a Kilrathi defector is able to shed light on the mystery and the pilots of the Claw are called to defend Firekka and the Confederation diplomats from a Kilrathi holy war.
The add-on adds 16 new missions to fly, with a linear mission structure. New Kilrathi ships include the Hhriss heavy fighter, the Snakeir strike carrier and an upgraded version of the Dralthi. The player gets to fly these new Dralthi, provided by the Kilrathi defector, in special undercover missions. Many of the Kilrathi fighters are now manned by the Drakhai, the elite Imperial Guard, while the Confederation's defenses are reinforced by two new wingmen, Doomsday and Jazz.
Player characters from both the original game and the first add-on can be transferred, and the Mission Selector from that add-on, allowing one to play any mission from Wing Commander, is also included.
It's clear in playing this that they were already deep in development of Wing Commander 2 and intended this to segue into the sequel. Bluehair suddenly becomes a lot more talkative, actual characterization starts to occur, and some rather sly bits of foreshadowing are dropped into the plot. In retrospect, the inclusion of Jazz and Doomsday appears to have been done solely to set them up as major characters in the next game. Similarly, SM2 also features the first mention\appearance of Prince Thrakhath.