Boon is called in to rescue an old friend and ex-ranger from Skaarab before all life on the planet is destroyed by a solar burn when the planet's second sun rises.

Wicked Isogul, the ruthless Hobobba crimelord, has a vicious new card up his sleeve: to destroy the Rangers' intricate defense system from the inside. His master plan to take over control of Fort Hope is brilliant - but the Space Rangers have a special surprise designed to stop Isogul's crimewave ... permanently.