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. In Letter from Masanjia, Sun Yi teams up with Peabody Award-winning director Leon Lee and takes you inside China's terrifying police state through the eyes of a political prisoner. He uses hidden cameras to capture details of his torturous past while authorities remain hot on his heels. Letter from Masanjia reveals how the brave actions of a bespeckled engineer in China and a mom in the US led to major changes on the other side of the world.