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As airman Adrien Dufourquet embarks on an 8-day leave in Paris to see his fiancée, Agnès, two South American Indians steal an Amazon statuette from a museum and force Professor Catalan, the curator, into their car. Catalan was Agnès's father's companion on an Amazon expedition during which her father died. Catalan believes that the statuette is one of three which hold the secret to an Amazon treasure. Adrien arrives in time to see the Indians abducting Agnès, the only one who knows the location of the other statuettes, and he pursues them to the airport where he steals a ticket and boards the same plane. Adrien tells the pilot that his fiancée has been abducted, but Agnès has been drugged and does not recognize him. The pilot plans to have Adrien arrested when they reach Rio de Janeiro, but Adrien eludes the police upon arrival. With the help of Sir Winston, a Brazilian bootblack, Adrien rescues Agnès. They retrieve the first statuette, but the Indians steal it back again. In Sir Winston's car, Agnès and Adrien drive to Brasilia to meet Señor De Castro, a wealthy industrialist who possesses the third statuette. On the way, they come across the Indians' car with Catalan slumped inside, and after picking him up, they drive on to Brasilia. At a party in their honor, De Castro takes Catalan to his strong room to assure him of the statuette's safety, and Catalan, who planned the museum theft, murders him and steals the statuette. By the time Adrien discovers the body, Catalan and the Indians have abducted Agnès again and escaped in a seaplane. Adrien steals a plane and follows. In a floating jungle cafe run by Lola, the woman who financed Catalan, Adrien learns that Catalan murdered Agnès's father and that Agnès is being held in a boat. Rushing to the boat, Adrien hangs onto the side as it heads upstream and finally docks. While Catalan goes to the underground location of the treasure, Adrien kills all of Catalan's accomplices and rescues Agnès. Catalan finds the treasure, but an explosion set off by a nearby demolition crew causes him to be buried with it. Adrien and Agnès flee the jungle and arrive in Paris in time for Adrien to catch his train back to camp.