The Shadow in the Cathedral is the first episode in the Klockwerk Series; Shadow begins a deep steampunk adventure in a world of clocks, gears and ornithopters. You are Wren, 2nd assistant clock-polisher. It's not a very important job, but it offers a place to sleep and bread to eat. You just wish you could someday make it to 1st assistant clock-polisher. Before too long you're trying to solve the greatest mystery in the history of St. Philip.