Lost in the heart of the Peruvian Amazon, there is a vine that is said to talk to humans, giving an understanding to the secrets of life. The custodians of this plant are the medicine men, or shamans. The divine does not give up its secrets easily.
It appears the botany of the plant is only half the story. To know it fully, you must experience its effects. Ever since he discovered the talking plants, studying human sciences at University, he has experienced with the hallucinogenic flora.
British plants are one thing, but in the Amazon they use Banisteriopsis caapi, or Ayahuasca, for their therapy and it's a strong medicine. The bitter Ayahuasca brew first makes its drinker violently sick, but it's in the fierce and often terrifying hallucinations that follow that the healing is said to lie.
But Ayahuasca doesn't work on its own, rather it acts as a key to unlock the psychotropic qualities of another plant, and it's this plant that Piers is after.