When a simpleminded young man is framed for a trading post heist, Sergeant Jim Chee and Bernie Manuelito jump in to defend him. Meanwhile, legendary retired Lieutenant Joe Leaphorn takes on the case from another angle—tracing a stolen diamond back to a tragic 1956 airliner crash high above the Grand Canyon. The crash site still holds the remains of a diamond dealer and a missing fortune, drawing both the victim's grieving daughter and a mercenary killer into the abyss. In the depths of the canyon, Chee, Bernie, and Leaphorn must untangle an ancient mystery and survive a violent storm before a murderer strikes again.