Jiří Němec

A group of the bourgeois head for a prominent figure's birthday party. As they venture through the woods and have a picnic, they're suddenly surrounded by some suspicious strangers.

A zoologist and a biochemist go out into an oilfield with a cameraman and filmmaker to observe and study the elusive oil gobblers.

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.