Mary and Charley are archaeologists with a difference. Since her accident on a mountain in Peru, Mary can think of nothing but crossing over into the world of the dead. Bound to her wheelchair, she eventually manages to decipher the inscription on the Inca stone. In "The Explorers," she and her husband proceed to work out the details of a deadly ritual. Call it success or failure, in the end their basement is a river of blood, Charley has crossed over, and Mary pays a horrible price.