Relegation in 1996, promotion in 1997, German champions in 1998 - 1. FC Kaiserslautern has written a football story that is still unique today. It will never happen again, says Otto Rehhagel. "The devilish miracle of FCK - a promoted team becomes German champions" is a 45-minute documentary by Jürgen Schmidt and Marius Zimmermann, in which German football legends and football idols such as cult coach Otto Rehhagel, world champion Rudi Völler and "football god" Olaf Marschall have their say on FCK's furious rise 25 years ago.