Mike and Susie Vargas (Charlton Heston and Janet Leigh) find their honeymoon on the US-Mexico border interrupted by an assassination. "Mike" is Ramon Miguel Vargas, a Mexican Narcotics Officer, and soon he's involved in the investigation and butting heads with his U.S. counterpart, Police Captain Hank Quinlan (Orson Welles), memorably described by his old flame, fortune teller Tanya (Marlene Dietrich), as a man who's future is "all used up."
