Scammed by a street woman-con artist, seventeen-year old Arsenia Eugen, daughter of the legendary Bud and Marta Eugen, vows revenge. But in a whirlwind of events, Arsenia finds herself rescuing her nemesis twice, and then partnering with her to take over a notorious cantina and cathouse. Ranch-raised and as capable as any vaquero, as well as educated at St. Joseph Academy in Eagle Pass, Texas, she finds herself in a world of fallen angels, gamblers, drunks, conmen, smugglers, gunrunners, banditos, treacherous militiamen, spies, and traitors. When she is dragged into the Mexican Revolution, Arsenia falls for both a dashing turncoat Mexican officer and a shadowy gringo gunrunner. But if she has to fight, she fights to win, and disdains the mere shotgun as wielded by her mother—machine guns are more her style. Not always sure which side is worth the fight and sacrifice, Arsenia finds herself instead determined to survive the war and protect not only the women following her, but her sanity and her heart.