In the 1960s, China is back as a major world power - a nuclear-armed communist state, charting its own course. Chairman Mao makes his return to frontline politics, calling for permanent ‘Cultural Revolution’. The consequences for Chinese society will be far-reaching, transformative and traumatic. But Mao cannot live forever, and as his power fades in the following decade, those in his shadow fight for the right to lead China into the future.