This film tells the story of Zhang Si De, a model of the Chinese People's Liberation Army. In the late period of the War of Resistance Against Japan, Yan'an was in a mass production movement. The service soldier Zhang Si De (Wu Jun) is honest, unspoken, never invites merits for doing good things, works hard and never complains, and devotes himself to the Chinese revolutionary cause.

In the capital city of Beijing, there is a special group who are affectionately called "alley housekeepers" by the people. The "alley housekeeper" is not a leader, but in their heart they wear all things of the neighborhood. There are many problems directly related to the common people, such as neighbourhood disputes, parking on roads, private construction, public toilet renovation, environmental improvement, and caring for the empty-nest elderly.

Her name is Xiao Li. She has believed in God for more than a decade. In the winter of 2012, she was arrested by the Chinese Communist police at a congregation. During interrogation, the police repeatedly coaxed, threatened, battered and tortured her in their attempts to seduce her to betray God by disclosing the whereabouts of the leaders and money of the church. Particularly in one frozen night when the temperature was twenty degrees below zero, she was forcibly stripped naked, drenched with icy water, electrically shocked on her genital, and force-fed mustard water by the police.... She had suffered brutal torture and unimaginable humiliation.