When foundling Maggie takes a job caring for Edward, she knows him only as a young man declared mad and kept privately under the care of a physician to avoid any scandal for his family. But Edward is the heir to the Duke of Buckingham and when his father dies his family determine to marry him off to secure the title and the estate. Edward insists that Maggie stay by his side, so she must be passed off as a lady for one social season, during which time a marriage can be arranged.

Julia, only daughter of the emperor of Rome, lives a life of excess and freedom. Wine, philosophy, and scandal—she revels in hedonism. But when her father dies and her teenage brother takes the throne, he will stop at nothing to seize control of both the empire and his wayward sister. And now Alaric of the Visigoths, a ferocious warrior who has battled Rome for years, has come to the capital to bargain for his homeland. When Julia rebels against the marriage her brother has ordered her to accept, he responds by publicly punishing her lover in the Colosseum.

At a dinner party in London during the season, Fitzwilliam Darcy meets an enchanting young woman. Though he recognizes her beauty and poise, he is struck by a sense of familiarity and realizes she is someone connected to him. What follows is a whirlwind of events in which the woman's lineage is discovered and her true identity is established. Darcy quickly realizes she is a woman estimable in her own right, and he finds himself besotted. But amid the miraculous events of a lost soul returning home, dark forces conspire against the young woman, for her loss was not an accident.

In the past, humans were the dominant star-traveling species in the universe—until the Chapalil came, conquered, and absorbed the Earth into their intergalactic empire. One of the only humans ever granted nobility by the Chapalil, Charles Soerenson once led a failed rebellion against the alien overlords. Now his sister, Terese, has abandoned her homeworld, impelled by a broken heart to seek a new life among the worlds her brother rules. On Rhui, a planet off-limits to interstellar voyagers, Tess stumbles upon a dangerous Chapalil conspiracy.

Vivacious Vivienne has finally won her family's approval by getting engaged to the wealthy and upright John Vandergrift. But when threatened by a vicious blackmail scheme, it is to her childhood friend that Vivienne turns; the deliciously wicked Viscount Dashiell. Lord Dashiell promised himself long ago that his friendship with Vivienne would be the one relationship with a woman that he wouldn't ruin. He agrees to help her just to keep the little hothead safe, but soon finds that Vivienne has grown up to be very, very dangerous to all of Dash's best intentions.