As soon as she saw a furry baby with a black button nose and curious eyes in a pet store, Kate realized that it was her dog. And she herself became Nelson’s closest and most beloved creature in the world. The smart puppy soon realized that Don, the husband of his adored owner, was not a match for her. One day he decided to follow Don and... got lost. In search of Kate, Nelson, together with a truck driver, traveled thousands of kilometers. He saved a man, but he almost died and lost his paw. He met many different people, learned to survive on the street with stray dogs and in a wolf pack. He also found a new owner - a boy who was missing his mother. Nelson helped the baby feel the joy of life again. However, the dog never forgot about his Kate. And she never stopped looking for him...