In 1875, Katherine's life is shattered when her beloved husband Caleb falls victim to a murder orchestrated by the nefarious Colonel Davis. Alone and overwhelmed, Katherine’s path crosses with John Scobell, a Black man with a troubled past as a former Pinkerton agent. Despite initial reluctance, John is drawn to Katherine’s determination and the injustice of Caleb’s death. Together, they form an unlikely alliance fueled by a shared desire for retribution.