On Christmas Eve, three friends dressed as Santa Claus are arrested in what looks like an attempted burglary and charged with being the infamous "Santa Claus Gang". While trying to prove their innocence to the police, the trio explains why they found themselves in such a strange situation...
Friends Aldo, Giovanni, and Giacomo travel from north to south for Giacomo's wedding: the father of the bride, a tyrannical rich man who is both their boss and father-in-law—since Aldo and Giovanni have also married into the family—has entrusted them with a costly piece of modern art, one that looks just like a rather unremarkable wooden leg.