Concurso de baile. A dance competition takes place in Gubbio. Natalina wants to take part but she needs a dance partner and asks Pippo, who is completely clumsy. Meanwhile, a dancer is killed being his girlfriend's father the main suspect.
A well-known tango dancer dies suddenly during a practice session for a dance competition. Suspicion falls on a well respected pharmacist, accused by his own daughter, the victim's dancing and romantic partner.