and Calculus go to the home of Professor Hercules Tarragon to protect him, as he and Calculus were students together. The police detectives Thomson and Thompson have also been sent to protect Tarragon. Tarragon reveals the mummy of Rascar Capac, and Tintin reads the prophecy that the expedition found in his tomb. A storm comes, a ball of lightning comes down the chimney, destroys the mummy, and Bergamotte realises that the prophecy is true. He is then struck down by the curse like the others. At the hospital, Fleur and her mother sit by the bed of Clarkson. Tintin arrives following Bergamotte's attack, and Fleur asks him to help her father. Tintin says he will, and leaves the hospital, whilst Fleur reassures her mother that everything will be alright because Tintin will help them. In the garden, Calculus mysteriously disappears following his donning the bracelet. Later at Marlinspike, Haddock is depressed because of Calculus's disappearance. Castafiore, her accompanist Igor Wagner, and her maid Irma arrive; Castafiore announcing she will be staying for a period. Tintin, Haddock and Snowy manage to escape and head to the docks, where they discover that Calculus has been spotted on the ship «Pachacamac» and is going to Peru. They catch a flying boat to Peru, and as it flies into the distance, the curtain closes on Act One. Act 2 In Peru, Tintin and Haddock ask whether anyone has seen Calculus, but are met with "No sé" ("I don't know") from everyone. Tintin and Snowy intervene to stop two men bullying a child. The child, Zorrino, reveals that he is an orphan living on the streets. Tintin cheers him up by making him a little boat out of newspaper. Zorrino reveals that he knows where Calculus is – he has been taken to the Temple of the Sun. Zorrino leads them on a trek to the temple, with many perils against them. Snowy is taken by a condor, and Tintin climbs to the top of a cliff to look for him. He is attacked by the condor and, hanging onto its legs, is carried to the ground where he discovers Snowy. Meanwhile, Thomson and Thompson have found Calculus's pendulum and attempt to use it to locate him. They mistake the indications given by the pendulum, and travel to the North Pole and meet an eskimo, to the Far East, and to Scotland. Eventually they realise