It could have been so beautiful: after a long search, the aspiring architect Sophie has finally found a dreamlike apartment in an old building - just the thing to move in with her boyfriend Martin. On the spur of the moment, she signs the lease, but when she brings Martin the good news, the married head doctor does not react very euphorically: Although his marriage has long been over, he does not yet feel ready to leave his wife and daughter. While the disappointed Sophie is reluctant to move into her dream apartment on her own for the time being, her neighbor there, the elderly Hannah, is doing everything she can to remain to herself. With temperament and imperious assertiveness, she has so far managed to stand firmly on her own two feet. But in view of her increasing frailty, the grumpy old lady reluctantly takes part in a pilot project that, thanks to state-of-the-art technology, enables independent living within your own four walls. And lo and behold: During an accompanying computer course, she met the pensioner Friedrich Seliger, who met her sharp-nosed tongues with charming serenity. Even in fleeting encounters with Sophie, Hannah is brittle and rejecting. Until one day, thanks to her newly acquired computer skills, she gets access to the e-mail account of her young neighbor. The path to Sophie's mailbox is not entirely correct, but Hannah's curiosity trumps her guilty conscience. Reading Martin's emails, she realizes very quickly that he belongs to the kind of man who promises everything, but does not follow suit: he will never leave his wife. Of course, Hannah cannot reveal what she knows about the young woman's private life and lovesickness. That's why she uses a clever trick to show Sophie that by waiting for her supposed dream man, she is above all missing out on her own life.