The Golden Idol of Sikrál (HERO Version)

From the publisher's website. When the review of a dead professor's papers reveals wrongdoing, the PCs find themselves chasing his unscrupulous nephew to Central America and into a long-lost valley where an ancient civilization unknown to modern man still lives. There they must explore - and survive - the temple of the frog-god Síkrál to prove themselves the true friends of the tribe and ensure that the professor's legacy is not exploited and destroyed.