James is a tourist visiting the Xann resort on the planet Erm, where fairies dwell and legends persist, when he meets Villa, who tells him about his own strange ancestry and asks for his help.
The Orion invaders have been draining Erm of its water, finalising the destruction already being wrought by the planet's own inhabitants, while spreading disharmony and war. To help her cause, Villa needs James and his impromptu wife, Rhu, to recover a lost computer, the Jade Skull.
In the meantime, Jara, the Jada of Jadanna, is invited to preside over a conference to discuss the future of the various peoples on the planet. With memories of Atlantis fresh in many minds, Erm's inhabitants must agree on environmental matters. Others have other ideas and Jara's daughter is abducted, with another crystal skull. Will the invaders return her unharmed?