Mistaking someone's identity / Trust is good...

Libero wants Lele to marry Alice, but his son doesn't feel ready yet. Er Pasticca, a friend of Alberto's, asks him to deliver some pills, but they end up in Annuccia's hands. Alice has planned a romantic weekend with Lele, but he has to go to a conference in Turin. Among the colleagues will be an old friend of Lele's, of whom Alice is terribly jealous.