The story as adapted from the novel by Kluun is partially autobiographical. In fact, some family members of Kluun's deceased wife (played by Carice van Houten in the movie) are present in the wedding celebration scene.
The trivia item below may give away important plot points.
In the movie Carmen goes to a grave yard to find herself a "nice place". When she is there she walks past a grave thats says 'Carpe Diem, Judith van der Klundert'. The personage Carmen is based on Judith, who is the wife of author Kluun.