Hope Amidst Despair
The last door of the prison was the very door Elisabeth unknowingly assisted in installing. She was well and truly trapped, and it still wasn't enough for Josef. At the start, Fritzl strapped his daughter's arms and tied them behind her back with an iron chain, securing her to the metal bed posts.
She could barely move, and after two days like that, Josef allowed her more movement by adding a chain around her waist. After another nine months of this torture, he removed the chain, not as an act of compassion, but because it was restricting his ability to assault her. He finally had a prisoner, and to the rest of the world, Elisabeth disappeared.