With the so-called end of the Mayan calendar fast approaching, fourteen-year-old Max Murphy and his new friend Lola, the modern Maya girl who saved his life in the perilous jungle, are racing against time to outwit the twelve Lords of Death. Following the trail of the conquistadors, their quest takes them back to the wild heart of Spain - a forgotten land steeped in legend, superstition and ever more bizarre tourist festivals.

With a pack of hellhounds on their heels and the cape-twirling Count Antonio de Landa in hot pursuit, the teens must face madness and betrayal, bluff and double-bluff, to uncover the terrible secrets of the long-lost Yellow Jaguar. But no matter where they run, all roads lead to Xibalba. There, in the cold and watery Maya underworld, we finally discover why only Max Murphy can save the world from the villainous Lords of Death.