In the tiger's lair

Two young adventurers return to the Andes to recover a hidden Inca treasure they previously discovered after escape through an underground river. Their campaign navigates snow-clad peaks, steaming jungle, deadly wildlife, and rival human foes as ancient Inca politics and treachery unfold: a prince’s conspiracy leads to exile, plots by priests and usurpers create betrayals and imprisonment, and local allies use cunning to counteract villainy. The action moves through daring rescues, subterranean passages, encounters with primeval beasts, and aerial rivalry, ending in a final confrontation that secures the treasure, seals the mountain breach, and establishes a new Inca ruler.