Under the mundane guise of a public relations firm, Singrid Karaman is actually running an intelligence network. Her new mission is to foil an upcoming coup attempt in the African country of Myassaland, and to recover the large stock of diamonds that have fallen into the hands of the mercenaries behind the plot. She instructs a former Nazi, Eric, to form a shock commando and her assistant, Carol, to contact the mercenary leaders, Commandant St Robert and Captain Tarquier. Although Tarquier is very suspicious, St Robert agrees to go aboard Ingrid's yacht.

After completing his military service in the Angolan War of Independence, Adelino goes back to the Portuguese fishing village he calls home, only to find that the woman he loves has married his brother. Overcome by bitterness, he sets off to find work in the countryside where he meets Albertina, a free-spirited young woman who challenges him to change his life.