Lucas Sebastian has never been one to ignore a lady in danger, even if she is trespassing on his property. Quickly disposing of her would-be assassin, he insists they keep the matter private. There are rumours enough already, about treasure buried under his garden, and occult botanical experiments performed by his late uncle.

Beatrice Lockwood, one of the intrepid ladies of Lantern Street, is in the middle of a case when her past comes back to haunt her. Joshua North, a former spy for the Crown, has come out of a self-imposed retirement after a disastrous case that left him scarred and forced to use a cane. He is hunting the villain who is blackmailing his sister. The trail leads him to Beatrice who is his chief suspect. But when he realizes that she is not the blackmailer they set out to find the real extortionist. Passion flares between them as they dodge a professional assassin. Meanwhile a mysterious scientist intent on resurrecting his dead lover using an ancient Egyptian formula for preserving the bodies of the dead is also hunting Beatrice. He is keeping his dead love perfectly preserved in a special, crystal-topped sarcophagus filled with the special fluid. But he needs Beatrice's paranormal talent to activate the reviving properties of the preservative in the coffin. Time is running out for everyone involved. The two cases collide at a mysterious country-house filled with artifacts from ancient Egyptian tombs. The drama concludes in the mad scientist's laboratory where Joshua discovers that the past he thought was dead is still very much alive—sort of.

Miss Amity Doncaster, world traveler, is accustomed to adventure and risk. Benedict Stanbridge, a man of science and a spy for the Crown, has faced danger in the darker corners of foreign lands. But they are about to face a threat that is shockingly close to home . . . One does not expect to be kidnapped on a London street in broad daylight. But Amity Doncaster barely escapes with her life after she is trapped in a carriage with a blade-wielding man in a black silk mask who whispers the most vile taunts and threats into her ear. Her quick thinking, and her secret weapon, save her . . . for now. But the monster known in the press as the Bridegroom, who has left a trail of female victims in his wake, has survived the wounds she inflicts and will soon be on his feet again. He is unwholesomely obsessed by her scandalous connection to Benedict Stanbridge—gossip about their hours alone in a ship’s stateroom seems to have crossed the Atlantic faster than any sailing vessel could. Benedict refuses to let this resourceful, daring woman suffer for her romantic link to him—as tenuous as it may be. For a man and woman so skilled at disappearing, so at home in the exotic reaches of the globe, escape is always an option. But each intends to end the Bridegroom’s reign of terror in London, and will join forces to do so. And as they prepare to confront an unbalanced criminal in the heart of the city they love, they must also face feelings that neither of them can run away from. . .