The modern cold female CEO transforms into a system to cross space-time and assist the Republic-era great-grandfather in defending the country and protecting the people, guarding the great-grandfather and former colleagues against foreign invaders' conspiracies, and protecting the great-grandfather and the common people to guard the national territory's mineral veins. The unyielding scholar from a hundred years ago time-travels in reverse to modern times, wielding the brush to help his great-granddaughter crush business wars, repelling the commercial tricks of the arch-enemy's descendants, and composing a two-way guardianship and bloodline inheritance spanning a hundred years.