S1, E1: Kate Humble retraces the steps of 15th century explorers as she sets out on a spice trail to India and Sri Lanka. Kate begins her travels on India's `Spice Coast' uncovering the story of pepper, once known as black gold and now the most consumed spice in the world. From India, Kate heads south to Sri Lanka, to the land of cinnamon where she takes part in the delicate process of harvesting the spice.