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 when the guide breaks his leg, it looks like the sixth graders are in for a bigger adventure than they counted on. Will they find their way out of the twisted underground maze? And can they do it in time to save their injured guide?