The Frog Cypher (Sam Harris Adventures 0.5)

Geologist Sam Harris gets her first job in Sierramar in South America. She is sent into the jungle to reconnoitre some gold deposits along a river. She stumbles across the cypher of a frog hewn into rock steps leading up into the jungle, a clue to the location of the lost treasure of the Incas. Sam and her companions mount an expedition to go and look for it but they are not the only ones who want the treasure. And their rivals for the prize are prepared to kill to get it for themselves. Sam's expedition faces a race against time to find the hoard before it is too late. Who will come out on top?