Libertus accepts a contract to install a pavement for Genialis, a self-important citizen from a nearby town, in the house of the customer's intended but unwilling and young bride, Silvia. However, the winter is exceptionally severe, and although the mosaic is laid in time to earn the promised bonus, Genialis goes missing in the snow before payment can be made. Meanwhile, at an important feast, the sacrifice is spoiled as an aged priest lets...