<p>Josef Fritzl was a 73-year-old retired engineer in Austria. He seemed to be living a normal life with his wife, Rosemarie, and their family¿though one daughter, Elisabeth, had decades earlier been "lost" to a religious cult. Throughout the years, three of Elisabeth''s children mysteriously appeared on the Fritzls'' doorstep; Josef and Rosemarie raised them as their own. But only Josef knew the truth about Elisabeth''s disappearance¿<br><br>For twenty-seven years, Josef had imprisoned and molested Elisabeth in his man-made basement dungeon, complete with sound-proof paneling and code-protected electric locks. There, she would eventually give birth to a total of seven of Josef''s children. One died in infancy¿and the other three were raised alongside Elisabeth, never to see the light of day.<br><br>Then, in 2008, one of Elisabeth''s children became seriously ill, and was taken to the hospital. It was the first time the nineteen-year-old girl had ever gone outside¿and soon, the truth a