Casey and Chris Keefer are two explorers in search of the world’s best hidden secrets. Casey is the history buff and when it comes to unexplained mysteries, he will be the one digging for evidence. Chris uses his love of tech to help reach those spots that are too narrow, deep and high for them to get to.
In this series, the brothers travel to the heart of Alaska to recover a plane that disappeared whilst carrying two American politicians. The brothers use their expertise to conquer the elements and solve this 47-year-old mystery. Amongst other expeditions, the brothers also traverse the thick and muggy Amazon jungle in search of the famous lost City of Gold.