When Professor Von Hardwigg and his nephew Henry discover a mysterious parchment, little do they know that it will change their lives forever. After many hours of studying the manuscript, and a great deal of painstaking research, they finally decipher the hidden code. It dates back to the sixteenth century, and is written by an Icelandic philosopher, who claims to have found a passage to the centre of the Earth. Is it a hoax? Or is it the greatest scientific discovery of the day? There is only one way for them to find out.