France, early 19th century. Reunited with his wife and young son, the famous adventurer Ethan Gage decided that he had had enough of adventure and danger - it was time to retire and enjoy quiet family happiness. But alas, these dreams were not destined to come true. Finding himself in Paris and trying to sell his battle trophy - a huge emerald - Gage fell into the clutches of Napoleonic gendarmes. They captured his family and threatened that they would kill them without pity if Ethan did not help the gendarmes find the ancient Aztec treasure from which that same emerald was once taken. Gage has no choice - and he again embarks on a dangerous adventure...