At the end of the 21st century, conflicts between superpowers over resources triggered a global total nuclear war. Survivors migrated off-world to escape the effects of radiation and the "nuclear winter." Subsequently, as a result of interstellar travel achieved in the mid-22nd century, humanity expanded its habitable zone further. The rapid expansion into space amplified various conflicting interests, leading to the establishment of the Space Empire centered in the Altair system and the Space Democratic Alliance centered in the Sirius system. A galactic war broke out, splitting the universe in two. Even into the 24th century, the battle for space continues. In frontline sectors, patrol ships handle reconnaissance and interception, where information warfare and maneuverability dictate victory or defeat. Unknown sectors are dotted with unexplored planets and lost space lanes...

The Space Democratic Alliance patrol ship Luminaris was navigating through a quiet corridor sector where starlight scattered faintly. In the pilot's seat at the center of the bridge, Lieutenant Safiya Foe rested her hands on the controls, reading subtle gravitational fluctuations. "Course clear. No communication response." From the console behind her, Second Lieutenant Mireine Camus's clear voice echoed. "Noise on the search sensors. Natural phenomenon... no, wait. This is—" Before she could finish, an alarm blared. —Multiple hostile signatures. High-output heat source detected. "Imperial forces!" Lieutenant Liu Reefa at the gunnery station immediately activated weapons control. "Deploying intercept lasers, missile lock!" Beams of light fired from across the sea of stars grazed the hull, and the impact shook the ship. Sparks flew across the bridge, and gravity control flickered for a moment. "Entering evasive maneuvers!" Safiya shouted. The ship turned sharply, narrowly avoiding enemy fire, but a second wave from behind scored a direct hit. "Starboard armor damaged, propulsion reactor pressure dropping!" "Comms down, long-range link lost!" Mireine reported. The Captain—Guest—gave a low command. "Prepare for warp. We're escaping into the nearest gravity well." "But the coordinates—" "We have to gamble!" Safiya gritted her teeth and hammered manual inputs into the half-broken navigation system. Reefa continued to intercept from behind, while Mireine bypassed the damaged antenna to send minimal navigational corrections. The next moment, the ship entered an incomplete jump. White light— Compressed space— A vibration that felt like it would tear the hull apart. Everything stopped. In the red glow of the emergency lights, the bridge was silent. "...Are we alive?" Reefa asked. Safiya checked the instruments. "Propulsion reactor stopped... main power is critical." Mireine restored the external visuals. Reflected on the screen was an unknown planet wrapped in a blue atmosphere. "Star system unregistered... it's not on the charts." Guest exhaled slowly. "We're crash-landing. Entering the gravity well." The uncontrollable ship entered the atmosphere while venting fire, tearing through clouds and falling toward the shadow of a mountain range. Safiya shouted without letting go of the controls. "I'll keep control until the end!" Reefa gritted her teeth and sealed the armored bulkheads, while Mireine desperately saved the black box and communication logs. A roar and a massive impact. Then—silence. Thus, the four were cast onto the surface of a planet that did not exist on any star chart. On a star where no rescue signal could reach, a new battle was about to begin.