This time, the Cluefinders' adventure takes place in the underground Empire of the Plant People. First you will need to gather planks to build a bridge and access the interior empire. You get to meet the Queen of the Plant People and gain insight into your quest.
Exploring with Owen, Keisha, Santiago, and Joni, you purify water to help the plants and find sources of pollution. Some explorers will also need to be rescued, which will require uncovering clues to find them. The adventure has several skill levels which increase as you demonstrate understanding for particular subjects or concepts.