In the county town in the 1990s, Han Changhe, founder of the Xinglong Canned Food Factory, and his wife Qiao Sufan returned to the factory on business, but were mistakenly blocked outside the factory gate by their son Han Weidong's girlfriend, Tian Lijuan. Temporary gatekeeper Du Chunni took the initiative to help the two seek medical treatment. Han Changhe hid his identity to sort out management loopholes inside the factory, and arranged for Han Weidong to rotate through the workshop, delivery, and counter positions for solid experience. A year later, Han Weidong grew and transformed, taking charge of the factory once again. Factory rules became more refined, and heartwarming systems benefited all employees.