Shi Yuan is a modern historian who transmigrates to ancient times after an accident and obtains a mysterious System. It grants him different identities and abilities, but in exchange, he must personally take part in historical events. From then on, Shi Yuan travels through one dynasty after another, playing different roles and helping emperors across the ages. Following the System's rules, he schemes and lays plans in each era, both propelling the course of history and keeping its broader trajectory intact. After witnessing the rise and fall, glory and shame of countless dynasties, he finally grasps the deeper meaning of history, uncovers the truth behind the System, and searches for his own destination and a way home through time. In the long river of history, he leaves a mark that is uniquely his own, forging a sweeping legend across time and space.
