男主角的叔叔在多年前乘坐大型机器去了地心，没回来。地心里有一个怪物统治者，会说话，还有很多奇怪的生物。男主角的叔叔当初带的一个项链挂坠之类的东西不知为什么落到了怪物手里。多年后男主角和一些科研人员重新制作了大型机器，向地心进发。

An Edinburgh professor and assorted colleagues follow an explorer's trail down an extinct Icelandic volcano to the earth's center.

During a summer of friendship and adventure, one boy becomes a part of the gang, nine boys become a team and their leader becomes a legend by confronting the terrifying mystery beyond the right field wall.