In 1868, Hays, Kansas is rowdy and dangerous with Wild Bill Hickok keeping the peace as the U.S. Marshal. It is hardly a place where a young girl would be found, but Zelda Lacy is not just any girl. She has traveled there from Missouri to find her twin brothers after their parents were brutally murdered. The twins are feared and notoriously evil, one being deceivingly warm while the other is stone cold silent. A family secret and violent past encounter between the siblings resurface and Zelda is forced to come to terms with her feelings toward her brothers while also experiencing the highs and lows of first love with a stranger who is not who he portrays himself to be. Delmar Strange arrived in New York from England under an alias to escape his life of deception by stealing from rich widows. His dream was to live a lawless life in the western frontier, but first, he must steal more money to achieve his goal. While in New York, he befriends a wealthy family, portraying himself as an honest gentleman. Once achieving his goal, he leaves New York behind and in his wake, a family damaged by his greedy actions. In the end, Zelda arrives back in Missouri to solve the mystery of who killed her parents and it is someone she never thought could commit the crime.