Behind the walls of a hidden monastery garden, a master herbalist teaches the secrets of healing to his apprentice. Half a world away, a tribal shaman gathers medicinal roots along the Amazon. In the hills of Tibet, a Buddhist monk brews a pot of green tea for an ailing brother. And, at home in a coastal Mediterranean cottage, a young mother keeps her child's fever at bay with a simple spoonful of thyme. For centuries, people across continents and...