Bursting right through the four-dimensional travel zone of subspace, Tellurian psiontists make an amazing discovery on the other side. Beyond the bounds of subspace, a parallel universe is cruelly ruled by a violent, murderous empire, the Justiciate, where psiontists are ruthlessly hunted down and fed to giant eagles. And within the Justiciate are lodged spies and traitors, dedicated to its overthrow - evil agents of the proud Garshan 'master race'. The arrival of the psiontists from Tellus triggers off a truly spectacular space adventure...