A stolen watch, a fleet-footed thief, and the project to build London's underground railway. You had better keep your wits about you.

A chance encounter reveals a dark secret in the tunnels under London.

London is at stake if you can't get the news out! But who's on your tail?

Can you make it through Van Ark's mansion and get the evidence to save London?

The stakes are high as Van Ark takes to the stage. Can you stop him before his plan destroys the world?