Plot and script: Guido Nolitta
Artwork and Cover: Gallieno Ferri
Zagor captures Samuel Toby, a dangerous serial killer that had joined George Mac Leods expedition. But, before being arrested, Toby injures Chico, and thus even Zagor and his friend must accept the Colemans hospitality and go to Stone Hill. Among Colemans men is also Digging Bill, who convinces Chico and Bat Batterton to open a mysterious crystal sarcophagus, full of jewels, in which lies a strange corpse