1904: It's a new century for Matthew Slade. He and Molly live the good life as ranchers in Helena, Montana. Their daughter Maddie has followed her father's lead to become the state's first-ever female detective. But Slade's peace is shattered the day he's caught in the middle of a bank robbery at the bank in Bozeman. Suddenly, the safe and secure world around him begins turning treacherous and violent. Stagecoach passengers are murdered. Trains are robbed. And the crime spree is heading right towards Slade and his family's ranch. More troublingly, an old friend and former mentor, Destiny Robishaw, appears out of nowhere in Helena. Slade's darkest suspicions about the man makes him pick up the guns he'd set aside more than twenty years ago. But can Slade, Maddie, and even the airship crew under Captain Amos Harding hope to prevail? Slade faces the unthinkable: going up against the man who taught him all he knew about being a gunfighter!