The year is 1977. After a divorce, director David Howard leaves his family in London and travels to Stockholm. With his friend Markus Vogler, his wife Marianne and their daughter Isabelle, he compares himself to Markus' successful career and happy family life. During the summer, David visits them at their summer house. There, something is set in motion between him and Marianne that will prove to have painful consequences for both them and their families.

The year is 1978: During the filming of the erotic film Susanna, David and Marianne grow closer. While working on the film, Marianne's daughter Isabelle witnesses something that was not meant for her eyes - an event that makes her both angry and hurt. Present: David and Marianne reflect on their relationships with their respective children and on everything that was lost.