Fifteen years after Earth's controversial attempt to use Langara's Stargate to dial the Ninth Chevron and reconnect with Destiny, the peaceful, self-sufficient planet finds itself under siege—not by force, but by infiltration. Despite Langara’s isolation and advanced planetary defenses, the Lucian Alliance orchestrates a quiet, calculated takeover from within. Disguised as allies, they exploit political corruption, manipulate infrastructure, and finally dismantle Langara’s defense grid, seizing control in a single night.
Commander Rathis Varok, brother of Commander Kiva, leads the invasion. Consumed by revenge and driven by his sister’s failed attempt to claim Destiny, Varok now seeks to finish what she started. Langara, with its Naquadria-rich core, becomes his gateway to that goal. To activate the gate and reach Destiny, he demands Earth send Dr. Rodney McKay, Dr. Daniel Jackson, and Colonel David Telford under the guise of diplomacy.
Stargate Command intercepts intel about the coup before the transmission arrives. With little time and fewer options, they agree to send the requested team—backed by secret reinforcements and the warships George Hammond, Apollo, Odyssey, and Daedalus. But Langara has been sealed behind a planetary shield—Ori tech, not Lucian. Communications go in, but nothing can get out.
Upon arrival, McKay and the others are ambushed and brought to Haven, Langara’s capital. There, Varok executes civilians to force cooperation. As McKay races to stabilize the dialing process, he deceives the Alliance into lowering the planetary shield. This gives Carter and her team aboard the Hammond just enough time to begin beaming civilians and wildlife off-world.
But the gate’s activation creates an uncontrollable power surge—Destiny's address locks, and Langara’s unstable core begins to collapse. As Arkad and his forces rush through the gate, McKay and the science team are forced to follow. Behind them, Langara is destroyed in a planet-wide cataclysm of fire and seismic fury, leaving nothing but debris scattered in space.
The last image is seen from orbit: a once-beautiful world, gone in a violent, apocalyptic scream.
And somewhere beyond the stars… Destiny waits.