On the sixth day of May in the sixth year of the Apocalypse, the Wanggong Factory Gunpowder Depot in the southwest corner of Beijing was suddenly enveloped by a blue-white light. The protagonist Lin Mo, a doctor of quantum physics, is studying the gunpowder ratio records of the Ming Dynasty here, trying to use the "historical disaster inversion model" he developed to deduce the environmental triggers of the demise of the Ming Dynasty. The moment he pressed the data fitting button, the entire archives room was "swallowed" by an unexplainable force. When he opened his eyes again, he found himself standing on the streets of the capital on the fifth day of May in 1626, and the smart bracelet on his wrist turned into a string of red numbers that kept beating: 1,000,000,000,000 Wen.
What's even weirder is that there is a reminder of the "Heavenly Punishment System" in his mind: the Ming Dynasty will trigger a "countdown to national subjugation" in the Wanggong Factory explosion on the next day (May 6th), unless he can use the "karma ransom" given by the system within the next seventeen years (before March 19th, the 17th year of Chongzhen) to bridge the key nodes of history and reverse the three super natural disasters that could destroy the North China ecosystem - and the consumption of each ransom will cause the number on the bracelet to jump irreversibly. Lin Mo soon discovered that this land was going through the deadliest stage of the Little Ice Age: drought, locust plague, plague, and severe cold were tightening like four nooses at the same time.
This is not time travel, it is a bill issued by history to the end of the world, and the interest is 40 million lives.