In this fifth saga of the Domino Series, the story continues with Robert and Jennifer and their new daughter heading back home to Mars in the alien ship. They have to endure stops along the way at the alien base station and another humanoid solar system. Verdock, the ex-ruler, confined for his crimes on Arret, escapes, and kidnaps his obsession. With his loyal followers, he steals one of the space crafts and gives chase after the ship with the humans. While a few crew members, left on board try to foil his attempts, DiLane crawls through the air ducts of the ship to escape the madman. The humans alien friends try to avoid contact with the inhabitable planet when Verdock attacks. A fight soon breaks out between the great ships.
Robert, trying to have a private moment with Jennifer on board their ship, encounters Verdock in hand-to-hand combat. Will the humans make it home?