Gennaro Di Napoli

Two customs officers are shot dead by a smuggler gang. The Italian police puts Mauri and Berti on the case, which quickly gain the confidence of Stefan, who is in contact with the smugglers. Stefan's niece Sandra falls in love with Berti and makes Beppo, another smuggler - whom she is promised - jealous. Stefan does not want to have anything to do with the smugglers, but he is forced to go again. Berti and Mauri are capturing the gang step by step. But Beppo can flee and warn Stefan. In the mountains it comes to the last fight.