Reborn into the vast cosmos of Honkai: Star Rail, Bai Bai Xuan finds himself aboard the legendary Astral Express alongside March 7th, Himeko, and Welt. However, he carries a secret far greater than any Trailblazer: the Containment Popularization System. Tasked with introducing the mysterious SCP Foundation to this universe of Aeons and Paths, Bai Bai Xuan must establish hidden bases, contain eldritch anomalies, and recruit agents across the stars.

His mission begins with a shocking universal broadcast that shakes the very foundations of the Interastral Peace Corporation, the Genius Society, and the Xianzhou Alliance. Declaring that humanity must protect itself from the unknown shadows, he initiates a grand scheme to control, contain, and protect reality itself. As powerful figures like Herta and Jing Yuan scramble to understand this new faction, Bai Bai Xuan operates from the darkness, turning cosmic horrors into contained assets while building an organization that rivals the gods.

In a world governed by divine Paths, one man decides to enforce rationality through absolute secrecy and overwhelming power.