The protagonist Lynch was cannon fodder at the bottom of the church in his previous life and died in an apocalyptic disaster called "Twilight of the Gods". He was accidentally reborn ten years before the disaster and was bound to a sand sculpture system called the "Savior Simulator". The system forces him to prevent "Twilight of the Gods", otherwise he will be wiped out on the spot.
Lynch, who was forced to go into business, took advantage of his foresight and the outrageous tasks issued by the system to make plans while complaining, and embarked on a strange road of salvation by "using magic to defeat magic and using routines to counter routines." He will one by one solve several key nodes that caused the apocalyptic disaster in his previous life, and in the process, he will gradually grow from a salty fish who just wants to survive to a hero who truly bears the fate of the world.