Chen Mo, a history teacher who has just quit his job at a prestigious high school, is left temporarily blind after a car accident. Just as his life hits rock bottom, he unexpectedly becomes bound to the Myriad Realms Emperor Mentor System. Its rules are simple: complete the daily teaching tasks to unlock progress toward regaining his sight, skill points, vast sums of money, and even special powers capable of changing history. With nowhere else to turn, Chen Mo takes a neighbor's offer to tutor history online. His students are a mysterious group who call themselves history buffs. They never show their faces, using dynasties or identities as aliases instead, yet they take his lessons exceptionally seriously and keep tipping him with “family heirlooms.”
Chen Mo assumes he's telling stories to a bunch of rich kids, so he launches into freewheeling lectures based on his deep knowledge of history, cracking jokes about everything from Xia Qi establishing hereditary rule to Puyi's abdication, with plenty of obscure historical anecdotes and modern values thrown in. What he doesn't know is that the people on the other side of the screen are dozens of emperors from Chinese history, from Yu the Great of the Xia Dynasty to Puyi of the Qing Dynasty! A disturbance in the fabric of time has given these emperors a glimpse of the modern world. Chen Mo's talk of “equality for all,” “strengthening the nation through technology,” and “sustainable development” sounds like divine revelation to them. They hail him as an “immortal from beyond the heavens” and secretly tip him with gold, jade, and other rare treasures. Their eagerness to ask questions also leads to countless comical mishaps. As the lessons continue, Chen Mo's eyesight gradually returns, and the System's rewards become increasingly astonishing. He, too, begins to realize that something is off about his students: their questions are frighteningly precise, and their tips are absurdly valuable. This teacher-student bond across time is racing toward a destination no one could have foreseen. Stranger still, someone seems to be watching it all from the shadows…