Silenzio: Si Uccide plot
Secret agent Mark Robin travels from one European capital to another in search of secret weapons deals. By sheer luck, he escapes an assassination attempt and then heads to Tunisia to follow up on an interesting lead. While visiting a botany professor, he emerges unscathed from yet another attempt on his life. However, he cannot prevent Diana, the daughter of the scholar, from being kidnapped by arms dealer Maude. A while later, however, Mark manages to catch Maude. He kills him in combat and frees Diana. He continues in search of smugglers, who are very active in their base: a cavern in the rocky coast that flanks the scientist's villa. He manages to take out the gang, but realizes too late that he has played everything into Diana's favor, as she intended to take over the weapons transactions herself. For the third time, Mark's life is in danger...