Strange anomalies descended upon the doomsday, and humanity was forced into endless flight. The one-in-ten-thousand Sequence Transcendents are the only hope to combat the anomalies. Ordinary person Lin Bei accidentally awakens the ammunition expert sequence, capable of infinitely supplying firearms ammunition and refining anomaly grenades. He joins the Oddity Train survival squad, maneuvering among transcendent teammates who each harbor their own hidden motives, collecting weird anomalies and oddities. He must both fight anomalies and guard against internal human plotting, struggling to survive in the crisis-ridden doomsday and searching for a way out for human survival.