High school student Chen Mingyuan dismissed the War of Resistance Against Japan in history class, believing that if he could go back in time, he would be able to rewrite history. However, an accident caused him to travel to Nanjing in 1937, where he witnessed the brutality of the Japanese army and fought side by side with his comrades. He eventually lost his legs in the war, but struggled to survive. When he returned to modern times, he found that he had only been away for five minutes, but the memory of blood and fire was unforgettable.
However, the rift in space-time has not closed. A mysterious photo album, a bloody school badge, a mysterious woman Zhou Yutong from the future... Chen Mingyuan gradually discovered that he was not the only time traveler. Classmate Lin Xiaopang and class monitor Li Yi were involved in history one after another, and the "Black Sun" organization hiding in the dark was trying to tamper with the past and destroy the future.
He must make a choice:
Are you going to stand by and let history repeat itself?
Or stand up, even if it costs your life?
When gunfire rang out again in time, he was no longer a bystander, but a guardian of history.
