A foreign spy service sends Mitar Petrović, an engineer, to Belgrade. His mission is to contact an enemy group that for some time has been planning to sabotage a project of great significance to the Yugoslav economy. The enemy action also has a political dimension as it is planned to take place during an international symposium of scientist in Belgrade. Stopping at nothing, Mitar's group prepares the final coup. Gradually the security service uncovers this clever and well-planned plot…
| Actor | Role |
|---|---|
 Slobodan DimitrijevićBožović | Božović |
 Dušica ŽegaracJasna Mirić | Jasna Mirić |
 Dragomir FelbaNot listed | Not listed |
 Rade MarkovićMarko Janković | Marko Janković |
 Vojislav MirićNot listed | Not listed |
 Faruk BegolliAgent Stipe | Agent Stipe |
| MMilan 'Lane' GutovićBoban | Boban |
| AAlenka RančićVera | Vera |
| JJosif TatićAgent Pavle | Agent Pavle |
 Milan PuzićNikola Jovanović | Nikola Jovanović |
 Janez VrhovecDoktor Polda | Doktor Polda |
| AAna KrasojevićNot listed | Not listed |
 Dušan TadićŠarac | Šarac |
 Toma KuruzovićPižon | Pižon |
 Predrag TasovacNot listed | Not listed |
 Minja VojvodićNot listed | Not listed |
| FFilip KovčinNot listed | Not listed |
| DDušan VojnovićNot listed | Not listed |
| JJovan RančićNot listed | Not listed |
| PPavle BogatinčevićNot listed | Not listed |