Campbell has found a "cure for cancer", but attempts to synthesize the compound have failed. With supplies of the successful serum running low, Campbell isolates a derivative of a species of flower from which the formula can be synthesized and with Crane's help is determined to find its source. A logging company is building a road headed straight for the village, threatening to expose the native population to potentially lethal foreign pathogens, as has happened before. In fact, Campbell's wife left him because he could not forgive himself for the tragedy.