This is the fourth in the series of the Archeo's adventures. Three high school seniors, Sam, Yoder and Mike have been schooled in archeology since they were toddlers by their grandfather Dr. James Michaels, an eminent internationally known archeologist. He always took them on what he called his expeditions in time and taught them archeology from the ground up. In their last adventure the Archeo's discovered something that changed their lives forever and now they are learning to live with those changes. They must guard them with their lives and have to be on alert at all times to things that might give their secret away. They are just finishing up there senior year in high school but things come up that require them to use their secret to help their grandfather out. A couple of the worlds greatest archeological artifacts have been stolen and their grandfather is sure they are in the hands of artifact thieves who are ready to sell them to unscrupulous collectors. If that happens they could disappear for years, if not forever. The Archeo's are determined not to let that happen. Shortly after their graduation, they involve themselves in a quest for one of the greatest artifacts in existence, the Holy Grail. Join these three young adventurers as they do all they can to protect, and preserve, the world of ancient artifacts.