A woman followed by three armed men collapses at Cobra's garage door. Cobra takes her in and kills the men. Cobra catches her spying on him so she tells him that her sister is being held by a slave trader and Guild member named Zygoba who forced her to spy on the Psychogun for him. With the film of the Psychogun schematics taken by the woman Vivi already in his possession, Zygoba orders reproductions to be made. Vivi tells Cobra that the reptilian Zygoba has modified his body so that he can pass through solid objects...