1851, London. All supernatural species have emerged from hiding, a result of The Great Revelation, led by Her Majesty, the vampiric Queen Victoria, and her dhamphir consort, Prince Albert. Cora Hastings is the British government's Species Ombudsman, a human tasked with keeping the peace between supernatural creatures. It's run-of-the-mill work: enforcing the newly created shifting parameters, negotiating contracts between species, and generally making certain all Londoners are treated equally. That is, until the Devil himself decides he wants to leave his hellish home and see the results of Prince Albert's greatest accomplishment, the Great Exhibition. His arrival could upset the uneasy peace between creatures, and worse - he's brought his son. The Marquis of Hell is diabolically good-looking, unnaturally perceptive, and, well, a demon. Cora navigates her sinfully seductive diplomatic assignment as best she can, until she catches wind of a secret conspiracy set to come to fruition at the opening of the Great Exhibition. This leaves her with an impossible choice: Either Cora enters an unholy alliance with the Devil's son, or she watches as her world is torn asunder...