Lubomir Kabakchiyev (Ivan Bobchev)Apostol Karamitev (Velizarov)Ivan Stefanov (Naydenov)Zheni Bozhinova (Nadya)Petar Dimitrov (Inzhener Tzachev)Georgi Georgiev-Getz (Shlosera)Ivan Tonev (Stefanov)Dimitar Bochev (Krasimirov)Yordan Matev (Monkata)Boyan Petrov (Marin Bobchev)Ivanka Sladkarova (Elena Bobcheva)Tinka Angelova (Maykata na partizanina)Svetoslav Stanilov (Vasilev)Vladislav Molerov (Kirov)Rangel Vulchanov (Stoychev)Georgi Kaloyanchev (Sali)Neycho Popov (Ahmed)Zhana Stoyanovich (Radka)
Anton Marinovich, Stefan Surchadzhiev
The university student Bobchev joins a youth brigade. The commander's council entrust Bobchev with a literacy course for members of the brigade. Velizarov and Monkata arrive in the camp to carry out sabotage. They place explosives on the dam, and attempt to win Bobchev over by means of intrigue. There is a storm: the camp is put on the alert. Everyone joins the rescue work at the dam. After a long struggle with Velizarov, Bobchev cuts the burning fuse of the explosive. The dam does not yield to the pressure of the flood. Everymen sing in Jubilation.