The musician Wilhelm Arndt seems to have everything going for him: he is happily married to Laura, he has been appointed Hoffkapellmeister, and he has just inherited a small fortune. Only the return of his long-lost friend Peter Vogel could make him even happier. When Vogel actually returns, he is jealous of Wilhelm's happiness, and convinces him that in order not to challenge fate, he should sacrifice something. Wilhelm starts an argument with his wife about her former life, but the couple's love is strong enough to overcome all difficulties. In the end, all agree that the sacrifice that has to be offered is the intriguer that tried to ruin their happiness: Peter Vogel has to leave again.