The bridegroom Jan Kaspar is an officer in the Klement Gottwald's Nová Hut rolling-mill. After bidding farewell to his freedom, he accidentally takes a sip from the bottle of tetrachlore which he stores at home. He disregards the dizziness, but the next day, he faints in the factory and has a brain concussion. During her regular tests, doctor Dudková is shocked by a high percentage of residual nitrogen found in Kaspar's blood. Doctor Bohácek, with whom Dudková consults, thinks that it is a liver disease and informs the head physician Filip. The doctors know nothing about tetrachlore and are in the dark about the case. Despite that, they immediately start to fight for Kaspar's life and their struggle consequently affects their personal lives.
František Peterka
Blažena Holišová
Lubomír Černík
Jarmila Kurandová
Jaroslav Raušer
František Smolík
Zdeněk Kryzánek
Martin Růžek
Jaroslav Rozsíval
Věra Koktová
Věra Bublíková
Jana Drbohlavová
Jiří Hanák
Zuzana Ondrouchová
Jiřina Steimarová
Ota Žebrák
Vladimír Brabec
Jiří Pick
Irena Fabiánová
Elena Hálková
Ladislav Kazda
Miloslav Holub
Luka Rubanovičová
Libuše Švormová
Nora Krčmářová
Luděk Pilc
Zdeněk Řehoř
Alois Dvorský
Karel Hovorka
Milka Balek-Brodská
Jiřina Bílá
Eduard Cupák
Zdeněk Kryzánek
Jiřina Bohdalová