In Sardinia there are more people than elsewhere who live to be over a hundred years old and stay healthy. What is the secret of this long life? Giovanni Vacca recently turned one hundred years old and he is still joking. Mariantonia Loddo, 103 years old, is proud of her beautiful hands and sings about the youth that passes so quickly. Rosa Frau is even 108 years old. Every day she mounts her headphones and listens to Radio Maria. In Sardinia, there is an above-average number of centenarians, not only women but also men. The phenomenon of longevity is being studied by a team of researchers. Is it genetics? The diet? By now the secret seems to have been solved. With the participation of the best interpreters of Sardinian music and the best-selling author Michela Murgia.