In Paris, Marianne and Abel are a couple and share a friendship with Paul. One day, Marianne tells Abel that she is expecting Paul's child, with whom she has been in a relationship for a year. Devastated, Abel decides to leave. Marianne and Paul get married, and their son Joseph is born.

Eight years later, Paul suddenly dies in his sleep. He leaves behind a younger sister, Eve. Widowed, Marianne reconnects with Abel, and a relationship rekindles between them. However, Joseph has difficulty accepting Abel's presence as a father figure. Meanwhile, Eve confesses that she has always been attracted to Abel, creating a new and complex sentimental situation between the three adults.