When Lin Xinyi’s ordinary life begins to unravel, she discovers a truth her mother nearly died trying to hide. A mysterious system has been watching her for years. A secret project erased from history is suddenly resurfacing. And the powerful man assigned to monitor her may be the only person she can trust. Gu Yichen was never supposed to get involved. His job was simple: observe, report, maintain control. Instead, he finds himself protecting the one person capable of exposing a truth powerful enough to shake the foundations of the system itself. As hidden archives awaken and long-buried secrets emerge, Lin Xinyi must uncover what happened to her mother, decipher the legacy of a project the world was told never existed, and decide whether the truth is worth the cost. But the deeper she digs, the more dangerous one question becomes: What if the person they erased was never the enemy?