Having come across covert operations and secret communications in real life, I can appreciate the high stakes and tension portrayed in this story. The three raw stones, invisible to ordinary detection methods but revealed by a secret light frequency, exemplify the use of advanced espionage technology. In fact, such ultra-high security measures are reminiscent of real-world intelligence practices where sensitive assets are protected by multi-layered encryption and unique detection codes. The emotional and physical reactions of the characters—shock, fear, and respect—reflect the psychological burden of handling classified information. The conversation about a 'state secret in optics' and a 'coded phone ringing urgently' paints a vivid picture of how intelligence teams communicate under pressure. From personal experience in tech-intensive environments, I recognize how vital seamless communication and quick decision-making are to mission success. This story also highlights the sacrifices made by insiders, such as the teacher who gave her life for the secret. Such personal sacrifices add a human dimension to the high-tech espionage world. The detailed setting—a rendezvous in ticket booth 307 on the third floor of the National Digital Library at 4 PM—emphasizes the precision and planning needed in confidential missions. Overall, this gripping narrative combining secret codes, urgent calls, and the hunt for enigmatic stones underlines the complex interplay between technology, human emotions, and loyalty in intelligence work. Readers fascinated by espionage, cryptography, or thrilling short films will find this story deeply engaging and informative.