This is a psychological whodunit. The action is tense and there are many ups and downs. Vas, a young militiaman, has to pose as a ex-prisoner and infiltrate an international gang of smugglers at work in Bulgaria. Vas is involved in shady deals: in a web for smuggling drugs. The traffic in drugs is perfectly organized, every one along the chain is being checked up and shadowed. An elderly gentlemen, a harmless nuisance on the face of it, turns out to be one of the bosses. Vas's role as a double agent, in doing his efforts to become a trusted ...