From publisher blurb:

A Mechanical Nightmare Awakens!

Victorian London: Heart of the most industrialised empire the world has ever seen. A heart that pounds to the rhythms of steam hammers, pistons, and whirring cogs.

Curious reports have begun to circulate London claiming the impossible: industrial and domestic machines have been witnessed acting on their own volition, attacking innocent men and women.

What strange power drives otherwise unremarkable lumps of cold metal to murder? What fuels the odd machine-haunted dreams that nightly plague hundreds of Londoners?

In a world ruled by machines . . . who rules the machines?

This detailed and lavishly illustrated scenario takes Investigators from Gaslit London through to nightmarish realms somewhere beyond sleep, all in search of answers to a bizarre mystery with roots in the distant past. Combining the trademark wit and intelligence of Geoff Gillan (Horror on the Orient Express, Regiment of Dread) with sweeping and imaginative visions of a world where Industrial Era technology has gone mad, this is a scenario like no other.

The promotional version says "promo copy. not for sale" on the back cover.