Kate Martinelli has seen her share of peculiar things as a San Francisco cop, but never anything quite like this: an ornate Victorian sitting room straight out of a Sherlock Holmes story – complete with violin, tobacco-filled Persian slipper, and gunshots in the wallpaper that spell out the initials of the late queen.

Philip Gilbert was a true Holmes fanatic, from his antiquated décor to his vintage wardrobe. And no mere fan of fiction’s great detective, but a leading expert with a collection of priceless memorabilia – a collection some would kill for.

And perhaps someone did: In his collection is a century- old manuscript purportedly written by Holmes himself – a manuscript that eerily echoes details of Gilbert’s own murder.

Now, with the help of her partner, Al Hawkin, Kate must follow the convoluted trail of a killer – one who may have trained at the feet of the greatest mind of all times.