The first film in Rudolf Thome's "Forms of Love" trilogy is the most incisive. It's a comedy-drame chronicling the ups and downs in the relationship of an unmarried couple (Adriana Altaras, Vladimir Weigl). When she tries to persuade him that they should have a child, he escapes the controversy by becoming preoccupied with his new aquarium and microscope. Their struggles to settle their differences and accept new responsibilities are presented intelligently, realistically and with low-key wit and irony.

Ausgerechnet im Urlaub kommt es zwischen Franz und seiner Lebensgefährtin Maria zu einem schweren Streit. Denn während Maria heiraten und Kinder bekommen will, fürchtet Frank sich vor einer allzu festen Bindung. In dieser schwierigen Situation beginnt er eine Affäre mit der Zufallsbekanntschaft Tina.