Roberta, (Emily Crawford) arrives in Venice to take up a music teaching post. While out shopping, she meets Lorenzo (Gualberto Parmeggiani) who, we learn early on is an artist with very much a hands-on approach to his subject. Lorenzo inveigles himself into Roberta's life and soon he is leading her into the seedier sides of Venice and his own philandering existence. Lorenzo encourages Roberta to try different things such as an orgy in a night club and to dress up as gay men in order to goad a couple of gondoliers into a fight. She gets to see Lorenzo at work and she realises what is happening but it is she who must choose whether to go with the flow or break away.