Acting on an abstruse tip-off from the renowned paraphysiologist Dr Rupert Gilhooly (a man who, like, knows a lot of stuff) one Bernice Summerfield has found herself on a probe-ship heading deep into the Problematic Heart of the galaxy — not knowing what, or quite who, she might find. What she finds is Station Control. A place that exists, simultaneously, in four hundred and seventeen dimensions, a brawling, souk-like Nexus between every world that can, or has or ever will be. And one of those dimensions is Hell.