Dark Side of the Moon

A new British space station, the Britannia, is due to be launched at the end of the week, but Bambera, Rix and Savarin fear that some kind of psychic entity is trying to sabotage it. Is it really the spirit of Helena McNamara, deceased astronaut and old friend of Rix? And does it speak the truth when it warns that something terrible is waiting for humanity on the dark side of the moon?