A woman in Oregon discovers an SOS note stashed in a box of Halloween decorations from Kmart. Her story goes viral and leads to the closure of China’s barbaric labour camps. News travels through China’s firewall and reaches the letter-writer, Sun Yi. A former Chinese prisoner who had been jailed for his beliefs, he now fears for his life and his family’s safety. Despite that, he’s determined to expose China’s human rights violations, whatever the cost.