The microfilm is about a pair of sisters Kelly and Wang Yu who come from Yimeng Mountain area to work in other places. Knowing that the teaching building of the primary school in their hometown needs to be built, they hope to use a piece of jade left by their mother to carry out a barter activity similar to "exchanging goods for villas" through the internet to help their hometown build the teaching building. In the process of network communication, they met Li Yuanchao, an old educated youth who couldn't let go of the past, and Zhangfan, a college student who broke up after graduation. Finally, the four of them had a strange relationship because of this exchange.