When his Aunt Becky drags Ben out to Colorado to help with her archeological dig, Lyse, Bell, and Carson tag along. Soon, chaos follows; Lyse is fighting with Bell, Ben is running off, and him and Carson are attacked by a deranged Native American and the scorpions he controls, which only makes their stay a nightmare for his aunt. But when Ben uncovers a map on a dead body the team digs up, he is literally off and running in search of treasure--after all the map has a big X on it. With a homicidal cowboy and the crazy Scorpion Master--who also want the map--on their trail, Ben and Carson trek deep into the wilds of the San Juan mountains, braving spiders, scorpions, Native Americans, and a suspicious-acting Leprechaun (Maybe?) to find their fortune. However, the treasure they seek, isn't the treasure they find--it's so much more ... and also quite deadly!