Lord Tedric of the Marshes, ex-Corpsman and interplanetary warrior, faces a crucial mission: to crush the threat of the Destructive Forces by capturing their agent on the Bioman sphere, the ruthless Black Knight Fra Villion

Tedric's crew are bound together by the strong loyalty of outcasts: Yod Cartwright, ex-pirate; Juvi, a prostitute turned expert pilor; Ky-shan the exiled Wykzl; Wilson, the renegade robot; and Pal Galmain, brave but banished Knight of the noble order of Vemplars.

Tedric mjust warn the Bio,en that their castle is a gatewhile for the annihilation gathering in the grey depths of space, but who will believe the word of a barbarian against the lightning whipsword of Fra Villion?