Hy Score is an agent with American Military Intelligence.
The time period for the first recorded adventure of this tall, handsome, and as we are told in the opening lines of narrative, "young, athletic-type" man is the Summer of 1940. Trouble is already well underway across Europe and North Africa and even players not yet officially in the midst of conflict are deeply engaged in espionage activity to attain any level of superiority they can. We find our protagonist in the arid region of the Arabian Peninsula as he embarks on a new and dangerous mission.
His full name is Henry Score but all of his friends, and most of his enemies, use the nickname of 'Hy'. His usual form of identification, at least as we meet him, is that of a journalist for an American newspaper as we are told in that he has used that cover many times successfully. We then will follow him pretending to be a reporter while actually a spy for the American Secret Service (not the former Treasury department, though). Later, however, we will find him reporting directly to the F.B.I. so his employment can be described at best as fluid.
Playing a major role in most of Hy Score's adventures, starting with the 6th one, is Kitty, niece of a druggist who is pulled into a case involving a foreign spy on the loose. Kitty is shown to be quite independent and forceful and, while not constantly on hand, will be around enough to be an influence on the operative.
Regardless of his employment status, Score is constantly at work and will find his case load vary a bit, from a simple whodunnit to going up against major war machines like the Japanese.