Lupin is out of money due to his long detention, so he decides to steal the Mona Lisa in Paris in order to sell it to a nationalist Italian millionaire. He manages to complete the theft, but he soon finds out he has stolen a fake, since the original Mona Lisa is in the hands of a corrupt French politician, Philippe, which is secretly using it to fund his political career. At the end, the real Mona Lisa returns to the Louvre, but Lupin manages to sell an incredible well done replica casually found by Fujikoto the millionaire. Meanwhile, the man who created the perfect fake, looking at an italian 1€ coin, believes he recognises one of his sketches on it.