A trespassing gang of boys encounter a ghost in the ruins of a castle. When they rescue the ghost who is caught in a trapset, they become allies in a fight to prevent ruins from being turned into mushroom farm by the city authorities.

Credits

Oldřich LipskýDirector

Jiří Sovákrytíř Brtník z Brtníku

Vlastimil BrodskýVávra (ředitel školy)

Dana VávrováLeontýnka

Jiří ProcházkaJanek Dlouhý