In 1780, the British are gaining the upper hand in the American war of independence. The colonists' strongest defense is the fort at West Point, which is under command of General Benedict Arnold. One day, American intelligence officer Major John Bolton meets with his commanding officer, General Robert Howe, and produces a coded message removed from the body of a spy he shot the night before. The message, from someone named Gustavus, contains top secret military information, and John concludes that Gustavus must be a highly placed person in the colonists' army...