Sur l'Île avec Ma Belle-Mère

After a shipwreck, veteran Jack and his girlfriend Ruth's stepmother Marcy find themselves stranded together on a deserted island. Their relationship starts out tense, but they have to rely on each other to survive. After joining other survivors, the camp leader Richard establishes a dictatorship and frames Jack and Marcy, forcing them into exile. Jack, Marcy, and their follower Mia build a new camp and form a rival faction. When the fugitives Lucas and Ron arrive, the camp plunges into a major crisis. Ultimately, thanks to Mia's sacrifice and outside rescue, the villains face justice and the survivors are saved.