Never in the history of mankind has one ventured into the mysterious depths of the Earth. That will change. Meet Chloe, Gizmo, Max, and Gigi Von Fiddlesticks, four of the most outlandish siblings you will ever know. And meet their rivals: Dr. Delicious, Dr. Danger, and Dr. Sunshine. Follow them as the walk the road less traveled and discover what no man has discovered before.