Ayahuasca, the holy sacrament which the indigenous people and Shamans of the Amazon have known as a powerful holistic purgative medicine capable of great healing and transformation for thousands of years. The film 'Other Worlds : A Journey Into The Heart Of Shipibo Shamanism' by Jan Kounen primarily shows the therapeutic power of the Shamans and their plant teachers. This power is a type of ancestral psychoanalysis or human psychotherapy backed by 4,000 years of experience and practice.