Deep within the Peruvian jungle, an astounding secret is about to be uncovered ... Matt's dad, an eminent archaeologist, has disappeared, leaving only a cryptic message with a bizarre set of instructions that lead him to the mysterious Julius Venture and a dangerous treasure hunt.

Soon Matt is crossing continents, deciphering codes and exploring ancient ruins - with monstrous enemies hot on his heels. If Matt wants to see his dad alive he's got to get to the treasure first. And all paths lead to the same place - a magnificent pyramid hidden in the Peruvian jungle.