The saga of the Bourbon de Linhaça family and their most precious possession: the Necklace of São Cajó, which has been in the family for over 3,500 years and hides secrets, curses, and a legendary codfish recipe. The film goes back in time to the history of the famous family from Santarém to remember the old myth of how the most important and valuable piece of jewelry in the history of Portugal, the Necklace of São Cajó, ended up in the hands of the Bourbon de Linhaça through centuries of struggles, battles, and some unprotected sex.