Niedziela pewnego małżeństwa w mieście przemysłowym średniej wielkości

The Milewskis are a middleaged couple Witold and Magda both occupied with careers in managerial positions create a solid wellmatched relationship They have no children this is Magdas decision who preferred to pursue a career rather than take care of diapers However little remains of the bond they had at the beginning Each Sunday each of them cheats on their partner and they both know nothing about it Everything changes when Witolds younger brother Franek a handsome geologist shows up at their place