Arriving in a mysterious village in South America to study the crater from a meteorite that fell to Earth five thousand years ago, the young Dr.Talion, inadvertently steps into a time portal that transports him to the chaotic time of the Toltec Indians, whose lands are being captured by conquistadors. Now the scientist must solve a complex problem: getting back to his time without dying at the swords of the Spaniards, or falling victim to the strange mystical rituals of the Indian sorcerers all while unraveling the mystery of iron in the swords of the conquistadors, which is capable of destroying all humanity and wiping our present world out of existence.