Joe Shaw returns as an intergalactic space traveler in Posteagenesis. The supernatural warrior is bounced through space and time and finds himself on a new Earth even further into the future. From there Joe travels to far off galaxies with the mission of making contact with the various races that the aliens reached out to before mankind destroyed them. It is a goodwill mission in which Joe seeks to open lines of communication and to teach members of the various races new technology that humans have developed during their transition from old Earth to the new, multi-planet home.
After several encounters with strange and unusual creatures, Joe finds himself trapped by the remaining aliens who were not eliminated during mankind's battle with the aggressive combatants. His decision to destroy the remaining aliens sends him flying into yet another time period. This time the warrior-explorer ends up in the United States during the twenty-third century. For the first time since his childhood, Joe puts down roots in the Los Angeles area. There, using the knowledge he acquired from the alien ship, he builds a successful corporation, marries, and becomes a father.
When a freak accident takes the life of Joe and his wife, Jean, their son, John, learns that he has inherited his father's supernatural gifts, which Duke, the computer robot Joe created, teaches him to control. Once John is able to accept his father's truths,
… he and Duke embark on a new mission to travel unexplored galaxies.
