Un si grand soleil: Plot developments for late September 2026

The French television series ‘Un si grand soleil’ features several developing storylines in upcoming episodes scheduled for late September 2026.

In the corporate plot involving L Cosmétique, Elisabeth faces pressure regarding the product Phynoma. While Janet suggests suspending commercialization for further testing, Elisabeth maintains that side effects are minimal and expresses concern over the costs of such a decision. Meanwhile, Boris manages the situation as Elisabeth prepares for a trip to Japan.

Personal conflicts continue as Florent and Cécile navigate the end of their relationship. Saskia reveals her encounter with Boris to Laurine, creating potential tension for Boris and Muriel. Additionally, Marc undergoes an undercover investigation at a sorting center, where he becomes distracted by a new acquaintance, potentially jeopardizing his mission.

Other developments include the official validation of Boris’s adoption of Toma and ongoing investigations at the police station involving Elise.