Li Ming was reborn in the courtyard house in 1960 and was bound to the "anonymous patriotic sign-in system". During the day, he works as a "little transparent" fitter in a steel rolling mill. He outsmarts the "animals" in the courtyard and quietly changes the frustrating plot. At night, he transforms into an invisible guardian and relies on the invisibility and other abilities rewarded by the system to anonymously fill the tens of thousands of tons of food received from sign-in into the national grain depot to alleviate famine. Hiding his merits and fame deeply, he protects the lifeline of his family and the country with his dual identity, and writes a legend of positive energy.
