Stroke is a painless, two-dimensional scenario about pseudo-saboteurs penetrating Air Defense Command headquarters in Colorado. The plot proposes that the Joint Chiefs of Staff have decided to move the ADC set-up from its exposed position at Ent Air Force Base to the interior of a hollowed-out mountain. When the Army suggests that even this is vulnerable to espionage, the Secretary of Defense asks the Army to prove it. Without warning the Air Force ahead of time, the Army will sneak a team of ""Reds"" into the ADC operations center. Though at first glance this seems like a game, it becomes a highly dangerous maneuver that involves loss of life. Army Colonel Lewis Crosson is given the assignment. He handpicks and trains a six-man team, to which is added a cold blooded woman reporter who does some preliminary spying for Crosson. The Colonel's original scheme explodes melodramatically, but he finally wins the day by use of disguises. The characters are as thin as the paper they're printed on, but the story keeps up a jog-trot.