On the occasion of her birthday, a young woman sends out invitations to her many admirers: she wants to marry the one of them who gives her the best present. While the numerous suitors appear, Ernst Lubitsch's character is almost too late: having lost a button on his shirt, he has to roller-skate to his beloved in order to arrive on time.
The effort is worth it, as he gives her the best present of all: a quarter of a pound of butter. Lost.