Lona Sarto is a model for the painter Alexander Andrea. The talented artist is in the process of making a painting entitled "The Pierrot". After completing his work, Alexander receives a first prize. During this time, Lona also get close to Alexander, but after the painting sessions Alexander loses interest in Lona and instead turn to Baroness Gisa Dalmar, whom he plans to marry. Lona cannot get over the painter's decision and persuades her admirer Jan Lars to murder the rival on her wedding day.