Professor Oakstead and inventor Arthur Vanguard have built a machine that will allow them to carry out Oakstead's life's work: to discover a forgotten race of beings who, according to Oakstead's theory, exist far below the surface of the earth. Having carefully selected three other team members, they are ready to launch their expedition.
But now, Vanguard has been wrongly imprisoned by a corrupt government.
Oakstead intends to launch his expedition tomorrow as scheduled, which means that Arthur Vanguard must be broken out of Plymouth Hill Prison. Tonight is the night.
Air pirates. Government goons. Dinosaurs. Unexplored realms.
How will your team survive the dangers ahead?