
According to the Bible, giants roamed the planet in ancient times. But where's the proof? Brothers Bill and Jim Vieira head into secret chambers, tunnels and mysterious burial mounds for evidence that a race of giants once existed, since none of the previously reported skeletons can be found in museums. The two hope that any discoveries they make could reveal new information about a secret chapter in history. It could take merely one bone or strand of DNA to get to the bottom of the puzzle.

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The Vieira brothers and a team of archaeologists find new evidence about the Goshen Mystery Tunnel; Jim investigates a giant account unlike anything he has seen before.
The brothers meet a witness to a possibly explosive find in Ohio and go down into a dangerous but promising cave in Tennessee.
The Vieira brothers head west to investigate an island covered in mystery and discover compelling evidence of giants, but their investigation takes a dark turn.
The Vieira brothers pursue promising leads on the Goshen Mystery Tunnel site, and on a giant skeleton discovered in 1849.