One day in Europe shows stories set in four European countries. All of them involve thievery in some way or the other. The protagonists are strangers in the respective country. For none of them their stay turns out as planned.

A Hollywood songwriter goes through a mid-life crisis and becomes infatuated with a sexy blonde newlywed.

When a hunter sent back to the prehistoric era runs off the path he must not leave, he causes a chain reaction that alters history in disastrous ways.

Swedish efficiency researchers come to Norway for a study of Norwegian men, to optimize their use of their kitchen. Folke Nilsson (Tomas Norström) is assigned to study the habits of Isak Bjørvik (Joachim Calmeyer). By the rules of the research institute, Folke has to sit on an umpire's chair in Isak's kitchen and observe him from there...

Two melancholic Hong Kong policemen fall in love: one with a mysterious underworld figure, the other with a beautiful and ethereal server at a late-night restaurant.