A near-deserted island is transformed into a prison without bars, holding some of society's most hardened gangsters. During the early 1960s, Singapore undertakes a revolutionary social experiment - to rehabilitate its most feared mobsters through sheer hard work. These young detainees, who have been held without trial, build a remarkable prison complex with their bare hands and it becomes the envy of world. Pulau Senang is a hailed as a beacon for prison reform but just three years later, the detainees riot. The attack sends shock waves around the world and sets in motion one of the largest criminal trials of the age. Secrets from Pulau Senang are soon revealed, where all is not what it seems.