Heroes of the Frontier

The story is situated in a border village where the local inhabitants speak Slovak. The commander of the Customs and Inland Revenue Service, Hladík, lives here with his wife, son, and grandmother. Two German tourists come to the village - a man and a woman - allegedly siblings, and they find lodgings at the house of wine-distiller and smuggler Roháč. Kriško, an inspector of the Inland Revenue Service, comes on visits to Roháč's niece Anička. The tourists, in reality agents, get their hands on secret military documents. During an exchange of fire at the border Hladík dies and his pregnant wife must hide his death from their son. An agent is seriously wounded and he takes refuge at Roháč's. Eventually he evidently dies. Roháč is suspected by the customs officers, and a schism comes between Anička and Kriško. When Roháč discovers who these tourists really are he helps in apprehending the agents and recovering the secret documents. Mrs. Hladíková gives birth to a child and together with her son and grandmother leaves to the interior of the country. (Based on surviving parts of the film)

The story takes place in a Slovak border village in Roháče. The commander of the customs and financial guard Hladík lives at the station with his wife, son, and grandmother. Two German tourists – a man and a woman – supposedly siblings, come to the village and stay with the wine maker and smuggler Roháč in an isolated cottage by the lake. Roháč's niece, Anička, is visited by Kriško, a member of the financial guard. Toman, the newly assigned financial guard, arrives and immediately after arriving with Hladík and Kriško, he disarms a gang of six sugar smugglers. Hladík's wife gives birth to a son. The guard receives a message that a secret liquor store has been discovered in the region. In a failed attempt to catch the horse smugglers, Toman injures his leg and discovers a secret liquor store in a cave belonging to Roháč, who leads a group of smugglers. The tourists, who are foreign enemy agents, set up a secret radio in the cottage. The military's counter-intelligence service has detected a mysterious disease in the border area. At the border, an agent number 106 hands a briefcase to a “tourist” from the cottage. He is surprised by Toman and Kriško. The man is shot and loses the briefcase. The badly wounded man finds shelter with Roháč. The financial guard discovers tubes with bacteria cultures in the briefcase. The customs find Roháč very suspicious. Anna fights with Kriško over the agent from the cottage. A dying agent orders another fellow agent to destroy a radio and carry a secret military document about the invention of a new warfare device across the border. Roháč manages to keep the agents hidden from Kriško and sends the spy to hide up in the mountains with an old shepherd. Toman discovers a transceiver in a cottage by the lake and manages to overhear the secret message and find the secret document. Kriško and his service dog number 11, Rek, call for more help. Roháč hides the body of a dead agent in the woods of the Spálená dolina, which is later discovered by a villager. The head of the foreign intelligence service sends Agent 112 across the border to destroy all traces of his predecessors. He forces Roháč to take him and the agent back across the border. When he can't find the document, he at least burns all traces in the lakeside cabin. Roháč tries to get the two agents across, but the border is guarded, and the trio gets trapped. The smuggler leaves the agents out of fear, and they get eventually caught. During a fight between Kriško and the agent, the dog Rek is shot. Roháč dies after falling into the abyss. Kriško gets engaged to Anna and is promoted. Toman, who is in fact a member of the anti-intelligence military defence service, is sent to the borderlands as a secret observer, completes his mission and is sent back to the interior of the country. (Based on the original script)