This film tells the story of Chinese migrant worker Yi Yeting, and his effort to eliminate life-threatening benzene from workplaces producing smartphones. While struggling with occupational leukaemia, he discovers many others have also been poisoned at tech factories in the Pearl River Delta. Seeking justice, Yi travels from his hospital room where he helps other workers, to Silicon Valley and the international stage. Against huge odds, he directly confronts corporate and government interests, while empowering and inspiring the people around him.