A small English village suddenly found itself in the center of a great story. A local Egyptologist has long wanted to get a legendary artifact - a unique Peruvian mummy in a green sarcophagus. To buy the relic was an assistant scientist, whom he sent to Malta. But, opening the box, the professor discovers in it the corpse of his assistant. The police are raising their hands. And the case is taken at once ... several "private detectives": eccentric professor, brave officer, sailor-adventurer, poor artist, beautiful widow and heir to the Inca ruler. The latter vowed to find the family heirloom and return it to his people. Who's the first to reveal the mystery of the green mummy?