The identity transformation from "witness" to "witnessed". When Lin Yuan is no longer just a transparent person hiding in the grass and taking pictures, but a "special person" who is targeted by Cao Cao, Liu Bei, and Sun Quan at the same time, how will he deal with it? More importantly, when he found that he could not change the course of history no matter how hard he tried, he began to think: Since the ending cannot be changed, can the process be changed? Can these heroes have less regrets when they are alive? Can we give ordinary people an extra bowl of rice and a piece of clothing in troubled times?