For thousands of years, people have experimented with plants as a way to cure sickness, conquer infection, and increase longevity. Now, medical researchers are tapping into this vast treasure trove of folk knowledge in their quest for modern drugs to fight cancer and other menacing diseases. Journey to the exotic Caribbean island of Curaçao where healer Dinah Veeris is on a one-woman crusade to preserve her homeland's threatened, medicinal plants. She is also saving the wisdom a vanishing generation of healers whose practices are steeped in African and Native American lore. And see how scientists are unlocking the power of the island's botanical wealth - from the divi divi tree's amazing ability to fight staph infections to Mermaid's Hair, a coastal blue-green algae with the promise of cancer cures.