A scientist and his nephew are hosts of Lana, queen of the Amazons, while other crew men try to find and take hold of the legendary Amazons' treasure.

Januário is a con man who, with the help of his equally con-artist friends, stays at the luxurious Hotel Palácio, posing as a rich cocoa farmer in order to rob and deceive tourists. Ananásia is a widow who also becomes a guest at the same hotel, with almost the same plan: to pretend to be a millionaire in order to marry some wealthy "old man". Januário and Ananásia immediately begin dating. However, their lies about their wealth make them targets of international jewel thieves who were among the guests.