The father of a Finnish family visiting the crumbling Berlin Wall rescues a cute puppy, Stormheart, and takes him back to Finland as a pet for his daughters. No one in the family knows anything about the dog, not even its breed. Little by little, the mystery of Stormheart unravels, and the dog´s new owners learn more about him. They find out that Stormheart´s parents had served as guard dogs at the Berlin Wall. In the film, drama, comedy and tragedy are created by the mere breed-typical behaviour of the Caucasian Shepherd. Pearl, the 7-year-old daughter of the Finnish family, takes the puppy under her wing. In the care of the tender-hearted family, trained only by little Pearl, Stormheart grows up with no rules or boundaries. In six months, the dog that has grown up to the size of a bear undertakes the task of removing all dangers, threats and obstacles from the path of Pearl, his little protégé. And Pearl, in return, loves Stormheart unconditionally. Stormheart is a great animal story for schoolchildren and their families; it is a film for all people who love animals.