Doug and Tony are transported to Veracruz, Mexico in 1519, when Hernando Cortez is searching for the Golden Mask of the Tlaxcaltepecs, a symbol of power for the Mexican tribes. When Cortez is about to torture three natives, Doug and Tony try to help them but are captured by the Spaniard soldiers. Meanwhile, the Time Tunnel personnel hire a Mexican archaeologist to help them with landmarks in Veracruz. But when the man sees the Golden Mask, his greed threatens to endanger the rescue.
—Claudio Carvalho, Rio de Janeiro, Brazil