Rothgo

While playing Hide-and-Seek, Terry and his sister, Helen, are caught in a sudden thunderstorm; however, on taking refuge in a nearby cave they are surprised to find that they are not wet. Inside the cave Terry and Helen encounter Phil, an older boy who has been following their recent game. After hearing a strange voice calling for help, the three children decide to explore the tunnel system; they soon reach a large cavern, where they find a black-dressed man trapped under a huge rock. The stranger gives his name as Rothgo, explaining that he is a wizard who has been imprisoned by his enemy, an evil witch named Belor. Rothgo urges the children to join hands and concentrate, and, to their astonishment, the stone levitates, allowing the wizard to get free. Rothgo implores the children for help: Belor has stolen from him a mystical object known as the Nidas, and hidden it somewhere in the past; without the Nidas, Rothgo is incomplete, and he will soon die – however, if the children will agree to help retrieve the object, his powers will be restored. Helen and Phil immediately agree, and, together with a hesitant Terry, they step into a magical stone labyrinth that transports them back through time and space…