A young man in the secret service is abruptly ordered to travel to New York and assume the alias John Burnham, reporting to the Cosmopolis Hotel to dine with a man named Holman who holds a stolen cipher message. His mission is to secure the original paper—using a prepared translation as a possible substitute—and to rely on code‑reading skill, improvised judgment, and funds and signals supplied by his chief. The task places him in immediate peril and forces deception, surveillance avoidance, and quick decision-making while personal relationships, including a budding attachment, complicate his loyalties. The story blends suspenseful espionage maneuvers with moments that probe responsibility, courage, and the costs of secrecy.