Françoise Sagan’s 1954 novel “Bonjour Tristesse” introduced generations of readers to a carefree summer spent along the sunny coastline of southern France. At just 18 years old, Sagan captured the melancholy joys and simmering jealousies of adolescence with insight well beyond her years. Her tale of a teenage girl navigating relationships both new and old during a family vacation quickly became a classic.

Two adaptations followed—the first a 1958 film directed by Otto Preminger. Known for his no-holds-barred approach, Preminger brought Sagan’s story of youthful passions and reckless desires to vibrant life. Over half a century later, writer-director Durga Chew-Bose took on the challenge of interpreting this beloved coming-of-age story for a new audience. Her 2024 film update seeks not just to retell Sagan’s plot but to recreate the bittersweet atmosphere and quietly profound insights of those memorable summer days.

Set along the sun-drenched Mediterranean coast that first drew readers in,...