While Mike, a Mexican policeman, is crossing the border towards the United States with his wife Susie, the two of them witness the murder of a businessman who is in his car when it explodes. The investigations of what comes out to be a homicide are carried out by inspector Quinlan and Mike helps him. Some time before Mike had arrested a gangster and his brother threatens Susie, hoping to avoid the policeman from witnessing during the trial. These two parallel stories twist during the whole film, which is remembered for the long initial sequence, completely shot with no editing. Also the infernal Quinlan suffered some cuts against Welles ‘will and in only in the past few decades it was re-edited just as Welles wanted. The film had a discreet success which covered the cost.