Fu Chu is one of the most important and strict prisons in Japan, where they have more than 2,000 people living together. In addition, it is the one that has the greater number of foreigners. Through the testimony of two French prisoners we know first hand how the inmates of Japanese prisons live behind bars. Fu Chu is known worldwide because many ex-convicts have sued the Japanese State for the treatment received during their incarceration. Amnesty International has been interested in this problem and has denounced the methods used to consider that they violate Human Rights. In this documentary the cameras enter for the first time in the premises of the prison and show how is the strict regime of this institution.