When Mark, Kyle and Mark's pet monkey Chee Chee climbed the tallest mountain in St. Kitts, they thought that was the end of their adventure. In fact, it was just the beginning. In Fury on Soufriere Hills, the two best friends are once again thrown into an exciting adventure as they travel into the past to the island of Montserrat where, with Chee Chee's help, they must try to save the Carib people from being destroyed by a volcanic eruption.