Time: 1933-1937.
Location: The fictional northeastern border town "M City".
Characteristics of the times: Japanese military control intensified, and the "use of China to control China" was implemented. There was not only Japanese and puppet oppression in the market, but also the struggle for survival and spontaneous resistance of the people at the bottom.
Erbengzi, a 16-year-old boy whose parents died, has been hanging out with the underworld since he was a child. He is a gangster in M City (a small town in the northeast). After he rescued "Qiu Chan", an underground worker of our party, his heart changed. He wanted to join the Communist Party and resist the Japanese invasion.