Twenty years later, Giovanni is mysteriously murdered and Cosimo and Lorenzo try to secretly investigate his death. Meanwhile, the political situation in the city is troubled by plots against the Medici family's power, and their vision for the future of Florence - which will then lead to the Renaissance - is in danger. Cosimo's dream is to complete the Duomo of Florence, but no architect seems to have a feasible solution due to the shape of the base created for the dome.