China, 1957. Chairman Mao has declared a new openness in society: "Let a hundred flowers bloom; let a hundred schools of thought contend." Many intellectuals fear it is only a trick, and Kai Ying's husband, Sheng, a teacher, has promised not to jeopardize their safety or that of their young son, Tao. But one July morning, just before his sixth birthday, Tao watches helplessly as Sheng is dragge…