At the beginning of autumn, in this bleak season, Xia Wei turned nineteen. They say that seventeen is ignorance, and eighteen is hard work. So, what is nineteen? Autumn is the season of harvest. Xia Wei and her sisters harvested love in autumn and learned about love. It's just that love requires meeting, getting to know each other, falling in love with each other, and staying together. But the most important thing is knowing each other. If there is no mutual understanding, how can we talk about loving and staying together? Will the twists and turns of love finally yield the result of staying together?