Three short story omnibus. The main hero and connecting link is Lieutenant Boruvka, created by Lubomír Lipsky. He deals with the murder case between climbers, the death of the dancer in the music theater and the strange disappearance of the mathematics professor.

Working on the hops fields gathering hops for beer, Filip catches a glimpse of fellow worker/comrade Hanka and falls for her. Trying to keep their love secret from the field owners,fellow worker Honza becomes jealous of Filip having a romance with Hanka, which leads to Honza deciding that he will feed the hop field owners Hanka and Filip's secret romantic hops.