Lin Xiaochen is an ordinary programmer in a modern city. One night, while working late, he accidentally triggers a time-travel program hidden in the code and is transported by a mysterious force to the end of the Northern Song dynasty, becoming part of the world of Water Margin. But his transmigration is no accident. He has been chosen by a mysterious entity called the Time Traveler Assistance System, which grants him the power to change the course of history. The System can provide historical information and strategic advice, and unlock all kinds of modern technology and knowledge based on Lin Xiaochen’s performance at Liangshan, from medical know-how to tactical guidance, even some astonishing technologies far ahead of their time. Lin Xiaochen must use these abilities wisely to help the Liangshan heroes tackle a series of absurd and hilarious problems, while being careful not to disturb history too much. His arrival brings unprecedented change to Liangshan. Using a modern perspective and his ingenuity, Lin Xiaochen helps the Liangshan heroes overcome one challenge after another, from cooking contests and stronghold defenses to poetry gatherings and tactical drills. His modern way of thinking sparks countless clashes with the ancient heroes’ bold ambitions. But history rolls ever onward. Can Lin Xiaochen’s intervention change the Liangshan heroes’ fate? Will he find a way back to the modern world? In this adventure across time, Lin Xiaochen experiences an extraordinary life and comes to understand the true meaning of friendship, loyalty, and courage.