During Fascism and after WWII, a school porter sacrifices himself so his son, who is slightly ashamed of a lowly background, can become a respected professor.The film also takes a few jabs at Italy's rapid governmental reshuffles.

Stefano Garbelli is employed by a pharmaceutical company. One evening Daniela, a young independent prostitute, approaches Stefano pretending to be a nurse. They get together, but Daniela has a sinister plan.