Kay Hoog finds a message that indicates that some Incas are still alive, but the secret organisation "Die Spinnen" wants the Incas' gold....

In San Francisco, the sportsman Kay Hoog tells to the members of a club that he has found a message in a bottle with a map from a Harvard's missing professor telling about a treasure of an Inca lost civilization still alive. He decides to go to Peru to seek the gold. However, members of the secret criminal organization "The Spiders" leaded by Lio Sha break in Kay's mansion during the night and steal the map. Kay Hoog travels to Peru, where he retrieves his map and a document about the Diamond Ship from The Spiders. Later he saves the Priestess of the Sun Naela and brings her to San Francisco. However, The Spiders kill Naela and Kay Hoog promises revenge for the death of his love.—Claudio Carvalho, Rio de Janeiro, Brazil

Im ersten Teil von Fritz Langs zunächst auf vier Teilen angelegten Abenteurer-Serie "Die Spinnen" jagt der Sportler, Abenteurer und Weltenbummler Kay Hoog dem sagenhaften Goldschatz der Inkas hinterher, von dem er aus einer Flaschenpost erfährt. Die Verbrecherorganisation "Die Spinnen" entsendet eine konkurrierende Expedition, angeführt von der schönen und gefährlichen Lio Sha. Am goldenen See rettet Hoog die Inka-Sonnenpriesterin Naëla und verliebt sich in sie. Er nimmt Naëla mit nach Hause, wo sie von Lio Sha ermordet wird. Kay Hoog schwört Rache.

A desperate, haggard-looking man puts a message into a bottle, and is able to throw it into the sea just as he is shot by an arrow. Some time later, well-known sportsman Kay Hoog announces to a large audience that he has found the message, which tells of a lost civilization that possesses an immense treasure. Hoog immediately plans an expedition to find it. But Lio Sha, the head of a criminal organization known as the Spiders, plans her own expedition, and she is determined to get the treasure for herself.—Snow Leopard