Al Lancaster discovers that defeating the Messiah plasma Alien did not end his troubles in Markan star system as the only Human fighting to survive among thousands of Aliens. He narrowly escapes death by laser at the opening of a memory crystal library on Thixen only to discover that a greedy Alien has unleashed a 'mind virus' that turns people who use memcrystals into violent psychotics! Then his lifemate Delo and their Dino babies are nearly killed by the mind virus crime syndicate. Al vows an Honor Fight to eliminate the Alien who threatens the lives of everyone in Markan, but finds his own Guild of Assassins unwilling to help him. Al soon faces an ultimate battle against the praying mantis-like Ketchetkeel Aliens who are somehow linked to the mind virus. He may die. Delo may die. But the mind virus must be killed before the A.I. algors in Markan eliminate every lifeform as a means of protecting themselves from insanity infection!