Human blood. In the ancient world, this precious substance was believed to be the ultimate gift that could be offered up to appease the omnipotent gods and goddesses who held the fate of the people in their hands. In this fascinating - yet alarming - documentary, discover the widespread history behind human sacrifice within various cultures throughout the ancient world. Investigate a mysterious European culture that once thrived on ritual murder, and journey to ancient Mexico to uncover the secrets of the Aztec sacrifices. Finally, travel to India to learn about the victims sacrificed to Kali, Hindu goddess of darkness and death. Ancient Mysteries journeys to discover the horrifying secrets behind the ancient practice of human sacrifice, and the shocking reality behind the modern-day sacrificial murders still being carried out by some remote groups in the world today.