Born a girl during the Civil War, Jack has been passing as a boy in the slums of Five Points, Manhattan, since running away from an orphans' home at age eight. He makes his living at petty thievery, surviving pocket watch-to-pocket watch until he discovers a talent for gambling. Lucy is a bright girl trapped in a dreary life with her widowed mother. When she meets Jack on the street, her days are happier than they have ever been. But her heart is broken when mother takes her far from New York, perhaps never to see Jack again. Her new home in a rowdy Arizona mining town is as dismal as ever, but she finds a glimmer of hope in dreams of a career on stage. Now, to find their way to the life they promised each other, Jack and Lucy will have to dodge dangers and take risks they never dreamed of as childhood sweethearts.