Fleeing the nightmares of Coldthistle House, Louisa and her friends have taken up a posh new London residence. But there's no rest for the wicked. Religious zealots from the shepherd's army are flocking to the city in droves, and ominous warnings are being left on Louisa's very doorstep. With the evil influence of her father's spirit growing stronger. Louisa knows she will be forced to pick a side in the impending war between the old gods. And she will do whatever it takes to save herself - even if it means returning to Coldthistle House and striking another bargain with the develish Mr. Monrningside. To uphold her end of the deal, Louisa must rejoin his supernatural staff to venture to a gateway between worlds: the Tomb of Ancients. But, as always, there's a catch....