Adrian Strathmore is a reclusive genius by day. However, by night, he is a masked avenger named Prometheus, rescuing unfortunate children from lives of prostitution. Horribly burned as a child, he loves the anonymity of his mask. Vanessa Bourke, the famous actress, is fascinated by both Adrian Strathmore, who throws flowers at her feet but remains in the shadows, and Prometheus, the masked man who shows up in her flat in the middle of the night with a small boy he’s saved. When she discovers they are one and the same, she begs him to unmask himself, to no avail. He is willing to lose her forever rather than trust her to love him despite his scars. Frustrated, she blackmails Adrian into marrying her, ruining his trust. Will he ever believe she’s come to love the man behind the mask?

When Lucien Strathmore, the Earl of Hawkesmere, sets out to find his abducted little sister, he finds the woman he'd once loved instead. Serenity Pratt had been the gamekeeper's daughter, and they'd spent one magical summer together, but then she'd disappeared without a trace. Now, she's back in his life and he must deal with the tragedy she's been hiding. In order to solve the mystery that tore them apart, he must take up the mask of Prometheus, the masked avenger he and his brothers created to deal with their troubled childhood. But what he finds forces him to make an untenable decision.

Lady Allison Croft has vowed never to wed. An heiress in her own right, she is determined not to let any man have power over herself or her money. She's convinced herself she can be happy living a quiet life doing charitable works. But when Polly, a former prostitute she's trying to help, is brutally murdered, her entire world is turned upside down. Inspector Quinn O'Brien has long been fascinated by the beautiful heiress he rescued. For years, he's managed to put his attraction for her aside and focus on his career, but when he starts to investigate Polly's murder, fate throws him and Lady Allison together time and again. As they explore London's seedy underbelly together, the desire between them flares high. But how can a lady and a police inspector ever build a life together?

Lady Jocelyn Layton is a young, widow who has no intention of ever marrying again. Her elderly husband left her completely independent, but her short marriage left her perfectly content to be alone. However, when her sister Evelyn goes missing, she is forced to turn to the one man who makes her pulse race. Inspector Sebastian Ness is trying to catch a serial killer, and he has no time to track down the whereabouts of a spoiled society lady, even if the most beautiful woman he's ever known is the one asking for his help. However, when it becomes clear that Jocelyn's sister might be yet another of the madman's victims, he is forced to work closely with her to find out what Evelyn knew before the killer strikes again.

When Mandrake Blackstone, the Assistant Metropolitan Police Commissioner, begins to suspect that his older brother, Viscount Danbury, is the notorious killer The Viper, he is determined to bring him to justice. But Drake has no proof, and one can't just arrest a member of the ton without being certain. But when he is kidnapped and trapped with lovely Heather Fields, a lovely lady's maid, Drake begins to question everything, including the code of ethics that was once so clear to him. But when he must choose between love and duty, what will he decide?