Lord Tedric of the Marshes, ex-Corpsman, revered hero of the Empire and personal friend of the Emperor, is a traitor.

Fugitive from the Security Forces, Tedric and his blue-furred alien friend Ky-Shan intend to join up with the most ruthless and successful renegrade in the Galaxy - the Bioman, Fra Villion.

Tedric's quest brings him in contact with a strange and fascinating band of people.

There's Milton Dass, a brilliant scientist who has invented the most staggering instrument of destruction the Universe has ever seen; Juvi, a prostitute seeking new excitment as a pirate; Yod, a back-planet boy hoping to revenge the death of his family; and, of course, Fra Villion himself, the Black Knight of the Iron Sphere.