Lupin steals an old Fiat 500 "Topolino" from a vintage cars' dealer, and Zenigata cannot arrest him because the car is extremely precious and could be damaged. The Fiat in fact belongs to an aged italian singer, Nora Anita, who is now on the brink of death, and her husband has decided to sell anything that could make him remember her love when she'll be dead to avoid further suffering...