Set in the future, the story is about
protagonist James Mowry and an inter-planetary war between humans (collectively referred to as "Terrans") and the Sirians (collectively referred to as the Sirian Empire, from
Sirius). The war has been on for nearly a year as the story begins. The Terrans, while technologically more advanced than the Sirians, are outnumbered and out-gunned twelve-to-one. The Sirians are a
humanoid species that share many of the same physical characteristics as their Terran enemies. Some of the more noticeable differences are their purple-faced complexions, pinned-back ears and a bow-legged gait. The Sirian Empire is reminiscent of fascist states that existed in the
Second World War; they frequently employ a much-feared
secret police force named the Kaimina Tempiti, or Kaitempi; they
censor much of their media and they quell opposition to the government or the war through the use of violence and intimidation. The novel begins by introducing James Mowry as he is being recruited by the Terran government to infiltrate enemy lines; to become a "wasp", in the sense portrayed in the opening passages of the novel. His recruitment is somewhat less than voluntary: Mowry is offered the alternative of conscription and assignment to the front. His dossier states that he can be counted on to do anything provided the alternative is worse; he accepts the assignment. Despite being coerced, Mowry is an ideal recruit, having spent the first seventeen years of his life living under the Sirian Empire. After extensive technical training and surgery to make him appear to be Sirian, he is sent to the Sirian outpost world of Jaimec to begin his mission. The first phase of his mission involves placing stickers with subversive slogans, such as "War makes wealth for the few, misery for the many. At the right time, Dirac Angestun Gesept will punish the former, bring aid and comfort to the latter" and "Those who stand upon the platform and openly approve the war will stand upon the scaffold and weepingly regret it. Dirac Angestun Gesept" all over the Jaimecan towns in the hope of beginning to create the first murmurings of confusion and concern in Sirian society. Mowry begins the second phase: sending letters to people of importance informing them of deaths by a mythical rebel organisation named
Dirac Angestun Gesept (Sirian Freedom Party). Mowry moves on to phase three, the hiring of Sirian civilians as
contract killers to assassinate prominent members of the Kaitempi and other government officials. With the Sirians becoming more concerned about the disruption they believe the
D.A.G. is causing, Mowry's success allows him to move on to phase four. Mowry plants fake
wire tapping devices on several buildings (including the Kaitempi headquarters) to engender paranoia. He also continues to spread rumours via Sirian civilians to plant other seeds of doubt among the populace. With a Terran invasion imminent, Mowry is told to skip to phase nine, the sabotaging of Jaimecan sea-borne commerce to divert Sirian concern from the real – and approaching – threat. This time, the Terrans strike and the invasion begins. Mowry is captured by a Terran occupation force and is held for a few days before a government man recognises that he is Terran. The novel ends with a government man informing Mowry that a wasp on another world has been captured and that he is the replacement. ==Themes==