After the fast-travelling system retired, it unexpectedly arrived in the 1970s and became the sent-down educated youth Song Nian. She originally wanted to live quietly, but used the supplies and knowledge in her space to help the villagers open a tofu workshop, sprout beans, and teach children to read. In the rustic rural life, she gained sincere friendship and found a new meaning in life. Turns out retirement is not the end, but a way to live life seriously all over again.