Programmer Li Muyun encountered an accident during a thunderstorm. When he woke up, he found that he had traveled to the world of "Water Margin" and became the short and ugly Wu Dalang. However, this time travel seems to have brought some kind of unusual "gift" - not only has he become taller and handsome, but he also has the mysterious energy given by thunder and lightning hidden in his body.
In the name of "Wu Da", Li Muyun runs the cake business while secretly observing the operation of the world. He soon discovered that this was not entirely the Water Margin world he was familiar with - the fate of some characters had changed. With modern knowledge and the lightning energy in his body, he decided not to be a spectator of history.
Starting from rescuing Pan Jinlian and changing Wu Song's fate, Li Muyun stepped into every node of the Water Margin world. He secretly influenced the heroes of Liang Shanbo and changed many of their tragic endings; he used modern business knowledge and lightning abilities to deal with the Song, Liao, Jin, Fangla and other forces; he even discovered the secrets hidden behind the world - it seems that others have also discovered the power to "change destiny".
Between the destiny of 108 constellations and the butterfly effect caused by it, a battle about fate, choice and morality quietly unfolds. When the torrent of history collided fiercely with the will of the individual, and when the known storyline was completely disrupted, Wu Dalang was no longer a weakling who was laughed at, but became a key figure who stirred up the entire Song Dynasty.
Can he change the fate of many Water Margin characters? Is the power brought by that lightning strike salvation or another curse?