Nine years have passed since ''Before Sunset''. Jesse and Céline have become a couple and parents to twin girls. Jesse struggles to maintain his relationship with his teenage son, Hank, who lives in Chicago with Jesse's ex-wife. After Hank spends the summer with Jesse and Céline on the Greek Peloponnese peninsula, Jesse drops him off at the airport to fly home. Jesse is a successful novelist, while Céline is at a career crossroads, considering a job with the French government.