The novel was subject to a dispute between Peter David and Richard Arnold, who wished the Borg character Rhiannon to be removed, with the logic that Borg could not be female. This was prior to a regular female Borg character, Seven of Nine, appearing in Star Trek: Voyager. Because of this, the novel was printed with a disclaimer making it explicitly apocryphal.
The plot centers around the actions of a woman named Delcara from a race which has been assimilated by the Borg, who has gone to extreme lengths to exact her revenge upon them. Delcara controls a Planet Killer, later revealed to be the finished version of the one fought by the USS Enterprise during the events of "The Doomsday Machine" episode of the original Star Trek. This Planet Killer is also 'inhabited' by the psychic impressions of its creators which exist as part of the Planet Killer's control system. Both Delcara and the 'ghosts' within the Planet Killer share a hatred of the Borg, and both Planet Killers are claimed to have come from just outside the galactic barrier surrounding our own galaxy. The Borg, having assimilated a Ferengi ship along the way, invade the Planet Killer, and force Delcara to attempt to reach Warp 10, then assumed unbreakable in Star Trek canon (later disproven in Voyager, though with grave consequences if the proper protection isn't in place), in order to reach the heart of Borg space to exact her revenge before she dies from severe phaser wounds.