Factory worker Li Qiuwen carries the horrific memories of being silenced by a ruthless factory. She returns to five minutes before the factory disaster. Desperately bracing herself against the workshop doors, she remains wary of the deceptive coaxing and manipulation coming from outside, while also keeping an eye on Liu Mei, the traitor inside the workshop. Together, the workers seek shelter and fight for survival within the factory grounds, evading pursuers and gathering evidence. Li Qiuwen leads her companions through one deadly ordeal after another, obtains crucial evidence of the factory's illegal dealings, exposes the crimes of Zhao Dehai and his accomplices, and helps more workers defend their legal rights.