Collected in a chalet during a snowstorm by Caesar, the old shepherd, Sébastien, whose mother just died giving birth to him, will grow up with the two grandchildren of Caesar, John and Angelina, also orphans. Belle, a large white dog, of mountain dog breed of the Pyrenees, was born on the same day as Sébastien. Six years later, Sébastien and Belle met each other. Belle escaped a kennel and, while she was hunted by the villagers, Sébastien saved her life. They became inseparable and will live together many adventures.