It's 1976, the South African government is imprisoning radicals who are fighting against the country's racist policies. Tim Jenkin, an accused terrorist, explodes a leaflet bomb to spread a message of freedom. Jenkin and his friend are caught and put in Pretoria Prison. Jenkin's former job as a locksmith and his position in the prison wood shop are the lucky breaks that save them, as Jenkin works to discretely make a key to open his cell. Ten more doors stand between them and freedom.