Sisters Serena Sutton and Willow Sutton time-travel to the exiled Marquisate of Serenity. Using System and RV, they overcome obstacles and establish commerce in Providence City. Facing Steppe Clans' invasion and Prince Corbin's army, Serena Sutton leads defense. Ian Shaw kills Prince Corbin, clearing their family's name. Serena Sutton is appointed head of Imperial Department of Invention, promoting new technologies to transform Providence into a commercial hub.