The rainforests of the world are our most prominent pharmacy and drugstore. More than a third of all prescription medicines in the western world are derived from rainforest plants. Yet, at the present rate of destruction of these forests worldwide, we are likely to lose important medicines before we have even found them. This documentary follows various scientists in various disciplines in their work: the ethnobotanist working with herbal healers to learn about the traditional use of green medicines, the pharmacologist bringing plants into the laboratory to find the chemical structure of active molecules, doctors trying to incorporate traditional medicines into western medical practice. Shot in Western Samoa, Thailand, Borneo, Papua New Guinea, and Brazil, the program is also a strong plea for rainforest conservation in cooperation with the indigenous peoples inhabiting these areas. (52 minutes)