Crichton, now aboard a dying leviathan named Elac, encounters an alien named Sikozu who aids him in stopping the Grudeks who are intent on obtaining toubray (Leviathan neural cluster tissue).
Everyone but Aeryn meets on Arnesk, where Jool has discovered the remains of an ancient civilization.
The crew discovers how far Scorpius has fallen in the Peacekeeper ranks. They must find and activate all the probes to stop the magnetic storm on Arnesk, but someone doesn't want them stopped.
