The premise is a group of guys with metal detectors go to historic US locations and dig for artifacts. They are typically on private property so will split the proceeds with the land owners.
I have found the show to be pretty interesting, but after the 3rd episode started fast-forwarding the first few minutes. Every episode seems to be the same in this regard. They will show up in the area, get turned down by the first 2 people they talk to, then will negotiate a split with the 3rd.
They have found some interesting items and have made some decent money from them.