 Ramar and Prof. Ogden come across two botanists who have just, they claim, killed their native guide in self-defense. Believing their story, the men are offered lodging for the night at Ramar s camp. However, what Ramar and Ogden don t know is that the men aren t really botanists but narcotics traffickers in Africa looking for new supplies, and they are taking a great interest in Ramar s and Ogden s new--and unpatented--medicines.