Mr and Mrs Schmitt are so terribly proper and normal, that they hold no secrets from anybody. At least, this is what they tell themselves. For a while now, they have had the sneaking feeling that they are being watched - by an animal in their garden. One evening, they lose their nerve and decide to finally capture it, but then they discover that the animal smokes, is 30 years old and is called Josef. Mrs Schmitt reacts hysterically, while Mr Schmitt wants to resolve the situation with a civilized conversation. The evening with their surprise guest, drags on for longer than expected because Josef wants only one thing: to get to know Mr and Mrs Schmitts better. They cannot turn away such a polite, but insistent guest. Only when Josef indicate mysteriously, that Mr Schmitt may have donated sperm in the past, does it all become too much, particularly for Mrs Schmitt.