For years, Romy Farrinton traveled at her world-famous archeologist father's side, exploring new lands and uncovering ancient secrets. It was everything she ever wanted, until a near-fatal encounter with hostile natives forced her and her father into a life of retirement in Boston and an undesired advance into proper society. Everything changes again when she's saved from an accident by a brash Texan in a back alley. Abel Courte may act like a care-free cowboy, but he's harboring a secret—he's searching for the Diamond of Uktena, a legendary jewel that can cure any disease known to man. He needs information Romy's father has in order to get to the jewel. When he traces the origin of the Diamond to Dakota Territory, he sets off to claim the treasure, only to find the archaeologist's fiery redheaded daughter stuck to him like a bug in sap. In a race against time, Romy and Abel must learn to trust each other as they undertake a cross-country journey that will expose them to lands uncharted by white men, a deadly battle against the fearsome creature in possession of the Diamond and a fight to return to civilization where they might make the greatest discovery of all—love.

After a tragic airship wreck, Captain Alwin van Buren makes a drastic decision to obtain a wealthy bride in order to save his flagging business. He meets his match in Sophie Barnes, heiress to an airship empire. After he seduces her and ensures their marriage—igniting a rivalry with her godfather—he learns the green-eyed beauty is as headstrong as he is. Sophie knows Van Buren's reputation based on a series of dime novels written about his adventures. Determined to be more than an end to a means, she despises him for luring her into marriage. In fiction, he's a no-nonsense captain on the verge of piracy, but the flesh-and-blood man wins her heart by proving she's worth more to him than her money. Their love is threatened when Sophie learns Van Buren's airship accident was a result of mythical creatures. Winged predators that appear to have a grudge against him, a fact he deliberately hid by accusing her godfather of sabotage. If she can forgive him for that, they still have to face the danger when they're cornered and at the mercy of beasts and the evil that controls them.