The four young snoopers Tim, Karl, Kloesschen and Gaby by chance discover a hidden cave near an old castle. In it there's a board that seems to describe the way to a legendary sword. They ask their history teacher Schindler about it. He forbids them further actions, but secretly continues investigations with help of two ruthless criminals. But our young heros don't give up on an adventure so fast...
Wolfgang Stumph
as Kommissar Glockner
Tomi Renjak
as Tim
Max Sittel
as Karl
Steffen Raddatz
as Klößchen / Willi
Sanny van Heteren
as Gaby
Wilfried Baasner
as Hirnvogel
Jörg Pleva
as Schindler
Volker Prechtel
as Pingling / Ritter von Zährenstein
Eisi Gulp
as Lothar
Christine Neubauer
as Trauthilde von Zährenstein
Waldemar Kobus
as Otto
Daniela D. König
as Hanna
