When Zhou Xiaoan, a history student, was compiling a list of fallen soldiers during the Anti-Japanese War, he accidentally traveled to Nanjing in 1937 and discovered that an APP on his phone that could not be uninstalled had turned into a "List of Heroes", pushing information about soldiers who would die in the next 24 hours in real time.
He soon discovered that he could not prevent the fall of Nanjing, nor could he change the outcome of any battle. The torrent of history rolls forward, crushing everything. The only thing he can do is to use his familiarity with historical details and this "foreknowledge" at the moment before the catastrophe occurs to snatch out flesh-and-blood people from under the knife, from the gunfire, and from the encirclement.
An artillery observer he rescued may have calibrated a key shot in the Battle of Wuhan;
A female soldier in the telegraph squad he rescued may have deciphered a secret message that affected the war situation;
The military doctor he saved may have saved hundreds of wounded soldiers who should have died...
He is a "fire thief" who walks in the cracks of history. What he steals is not victory, but "hope" itself. When countless tiny fates are rewritten, can the gathered strength warm those cold years a little?