Conjugation: Beijing, winter 1990. Song and his girlfriend Xiao Qing have just moved into a hovel which they're illegally renting since they are not officially married. Song, a young chemistry graduate, is appointed to a position in a small engineering factory where he demonstrates a marked lack of enthusiasm. As for Xiao Qing, she is still a student, studying French. But their joy at living together and the idea of building a little island of happiness cannot withstand the weight of reality.