Identical twins Elizabeth and Jessica Wakefield are about to say goodbye to sixth grade - forever! But it's not over yet...
The entire sixth grade is going cave exploring - spelunking! At first, Elizabeth is thrilled to roam through the Ice Cave with her friends. The cave is beautiful - it shimmers with every beam of their flashlights, and Elizabeth even discovers an underground waterfall! But when the guide breaks his leg, it looks like the sixth graders are in for a bigger adventure than they count on. Will they find their way out of the twisted underground maze? And can they do it in time to save their injured guide?
