Marlowe Hapworth is found dead in his locked study, killed by an unknown assailant.
This is a case for the Great Detective, Madame Vastra. Rick Bellamy, bare-knuckle boxer, has the life drawn out of him by a figure dressed as an undertaker.
This angers Strax the Sontaran. The Carnival of Curiosities, a collection of bizarre and fascinating sideshows and performers.
This is where Jenny Flint looks for answers. How are these things connected? And what does Orestes Milton, rich industrialist, have to do with it all?
As the Doctor and Clara joint the hunt for the truth they find themselves thrust into a world where nothing and no one is what they seem... Justin Richards' thrilling new novel stars the Twelfth Doctor, as played by Peter Capaldi in the hit BBC TV series, and also features his friends Madame Vastra, Strax and Jenny - the Paternoster Gang.
It is read by Dan Starkey, who plays Strax in Doctor Who. Reading produced by Neil Gardner. Sound design by Simon Hunt. Executive producer: Michael Stevens. 5 CDs. 4 hrs 32 mins.