Edinburgh, 1773. A storm is coming. A storm that will shake the Age of Reason to its very foundations.

When rumours spread of ghouls haunting Edinburgh's old town, there is only one person who can help. Dr Samuel Johnson: author, lexicographer... and a genius in the occult and supernatural.

With his good friend and companion, James Boswell, Dr Johnson embarks on a quest to unravel the hellish mysteries plaguing the city. But what they uncover is darker and more deadly than they could have ever suspected, an evil conspiracy which threatens not just the people of Edinburgh, but the whole of mankind.

For the tunnels under Edinburgh's Old Town hide a terrible secret...

Before Holmes & Watson, before Abraham van Helsing, there was Doctor Johnson & James Boswell: scourge of the hidden, supernatural world of the 18th century.