Based on the famous French children's book, which has been adapted into TV series and movies many times and has attracted 8 million viewers worldwide, this film is the final chapter of the trilogy. Belle is now the mother of three dogs, and Sebastien (Felix Bossuet) is now 12 years old. Sebastien faces a new threat: Joseph, who claims to be Belle's legal owner, wants the four dogs back, and Sebastien does everything he can to protect his best friends.