Lily and Dale perform tests on a gold-colored urn that has ties to an ancient blood ritual. The guys figure out whether a spyglass found on a mountaintop belonged to a famous explorer. Other finds include a mysterious statue, a carving found deep beneath a Dallas skyscraper, and a coin that turns out not to be a coin at all.
A strange brass ball has Leonard and Blue intrigued, while Dale tries to figure out whether a man has a rare microscope owned by Thomas Jefferson. Later, Mike and Blue launch a full-scale archaeological dig at what could be the site of a lost battlefield tied to Andrew Jackson. Other finds include a strange carving pulled from a Connecticut river and a broken statue treasured by one man's father.
Items discovered include a mysterious disc found in the Sulphur Fork River; buried weapons, a puzzling coin, a rifle that may have belonged to Gen. Custer, and a possible clue in the disappearance of a Revolutionary War soldier.