Managers at the construction of a big hydro plant are accused of having embezzled money.
Acting
Vlado Müller's face does three hours of emotional labor in 90 minutes.
Direction
Klos and Kadár weaponize empty space and fluorescent lighting.
Writing
Dialogue so circular it should come with a nausea warning.

Director
Ján Kadár
Trivia, insights & behind the scenes
Made during brief Czechoslovak New Wave thaw; Kadár later fled to US after 1968 Soviet invasion.
The hydro plant itself is a character—socialist progress literally built on shaky foundations.