In a distant future, humanity's galactic empire — the Imperium — breaches the walls between universes and discovers the Metaverse. A research project goes catastrophically wrong when the Holy Caste creates the Metacell: a single-celled organism born from both dimensions that evolves at an impossible rate, escapes containment, and threatens the existence of both verses. High Paladin Dominic Moore and his crew are pulled from vacation to stop it.