Contact Mr. Delgado

English adventurer Harvey Landon agrees to help his old Oxford friend Don Vargas who is plotting the overthrow of a South American government. The Revolutionaries however are without aircraft and to obtain their supply Landon volunteers to take a letter out of the country to a mysterious Mr. Delgado in New York. Complications begin as Landon is stalked on board the New York-bound oil-tanker by two agents intent on killing him and stealing the letter.