Benjamin, 9, has lived with his paternal grandmother since the death of his mother. He decides to join his father, Christian, gold prospector in Brazil, accompanied by his two grandmothers who hate each other.

The story of nine-year-old Benjamin and his two grandmothers who hate each other in search of his father, a gold miner in Brazil. Pursued by killers, a jaguar who hates opera, Indians who fall in love with the two grannies, they eventually find Jean, the best friend of Benjamin's father. Because the father, he came back to Paris - Finally, that's what they thought.