In Tianjin in 1925, Lin Peiyao, the daughter of a comprador, unexpectedly discovered that her father had colluded with foreigners to sell opium, and she was determined to expose the truth. She met Zhou Mingxuan, a journalist who had returned from studying abroad. The two used the foreign building as a base to collect evidence, but were retaliated by her father and foreigners. In the end, Lin Peiyao gave up her family interests and went to Guangzhou with Zhou Mingxuan to join the revolution.
