The melody of the hymn echoes in the old streets and alleys of the city. This is strange in a country that regards religion as a spiritual opium. The small, messy street was full of old people, and they began to pray with the sound of the room on the street. On the roof, a simple cross gleamed in the sun. During the Cultural Revolution, Christianity was completely eradicated. In China's political environment, Christianity has always been regarded as an extremely reactionary and evil thing, and openly believing in God would bring prison sentences. After the reform and opening up, Christianity also resumed activities. Although the Three-Self Church under official control is orthodox, house churches that are not under official control have also emerged in various cities. This film documents the activities of a house church in Nanjing.