Marcie Horton has a sixth sense. Not in the "I see dead people" way, but . . . well, maybe a little. She feels a sort of knowing about certain things that can't be explained--an intuition that goes beyond the normal. Then there was that one summer four years ago, when she connected with a long-departed spirit . . . But nothing that incredible has happened to Marcie since. This summer, Marcie is spending time working at Angel Mounds, the archeological dig her mother heads, along with her brother, Eric, and his girlfriend, Renee. The dig is the site of an ancient indigenous civilization, and things immediately shift into the paranormal when Marcie and her dig teammates meet Lorraine and Zeke. The two mysterious dig assistants reveal their abilities to access the Universal Energy Field with their minds--something Marcie knows only vaguely that her brother has also had experience with. Marcie learns how our planet will disintegrate if action is not taken, and she and her team must decide if they are brave enough to help Lorraine and Zeke in their plan to save Mother Earth, her resources, and her history. It looks like the summer just got a lot more interesting.