The planet Cadwal has an ecosystem unique in the human-explored galaxy; a thousand years past it was set aside as a natural preserve, protected by law and covenant against colonization and exploitation. But now the elite Conservator culture that has developed on Cadwal is facing a conspiracy of humans and aliens to open the planet, and its rich resources, to full commercial use. Glawen Clattuc, scion of one of the scientific houses of Cadwal, must…