While hiding from an assassin, half Zuni Indian "Ho" Tanner discovers an ancient sound frequency structure. Trying to survive a Mexican smuggler's vendetta, and his own natural curiosity, he joins a Spanish gold treasure hunt team. Subsequent clues reveal an impending solar flare event which imperils all sentient life forms on the earth. Desperate cosmic timing, and trying to stop the Aztec crime lord from world domination, propels Ho and his friends to cliff hanger, heart stopping action.