Again adventure well backgrounded in foreign atmosphere -- this provides a jigsaw full of the local color and politics of Yugoslavia. English engineer Hudson is drawn into the plot to help a VIP evade international surveillance and plays out a dangerous game with Comrade Zarko and his Russian superior. Hudson's mentor is reported dead, comes alive only to be betrayed and really killed; Hudson makes contact with the VIP and is able to make arrangements for the getaway. In outfoxing his suspicious shadowers he makes certain the VIP's escape and the safety of loyal, lovely Franja. Full justice to hazardous hounding.