Nora, the wife of the architect Heinz Ottendorf, feels neglected by her husband. He is getting more and more engrossed in his work, but Nora, apparently a stranger to hard work, suspects that the real reason for her husband's diverted attention must naturally be another woman. Robert, the cousin of Nora's friend Marianne, has long been in love with Nora and sees an opportunity to win her hand. Heinz, for all his distractions in his work and the phantom lover he doesn't have, isn't quite ready to let Nora go. While he may be married to his work, his work is a fickle mistress: he makes a career error and this leads to near financial ruin. He begs Nora to be patient with him. Marianne, who for her part is in love with Heinz, spins a web of deceit and intrigue, which leads to Robert taking a potshot at Heinz and then eventually causing Robert to kill himself.