Rescued in a cottage during a snowstorm by Caesar, the old shepherd, Sebastian whose mother has just died giving him birth will grow with the two grandchildren of Caesar, Jean and Angelina, also orphans. Belle, a large white dog, breed Pyrenean mountain dog was born the same day as Sebastian. Six years later, Sébastien and Belle will meet. Belle escaped from a kennel and while she is hunted down by the villagers, Sebastien saves her life, they become inseparable and will live together many adventures.