A mysterious pyramid assumes orbit about Earth and fires a beam of energy that hits well outside of New Chicago - and nevertheless shakes the city! It is part of Princess Ardala's latest assault on Earth. This time, she demands that Buck Rogers marry her, as part of her ascension to the Draconian throne! With the fate of Earth's cities on the line, Buck may not have a choice - unless he can convince a hermit to teach him what he must know to find the weapon's control center aboard Ardala's ship.

A cargo ship passes through the stargate and collides with Delta Station. All her crew are dead, and the station's physician suspects the dangerous virus EL7, which numbers hallucinations among its symptoms. So when Wilma begins to feel stalked, the commander assumes she's just getting sick. The truth turns out to be far worse.