In early 20th century London, the Banks, a wealthy but disjointed family, have serious problems connecting with one another. The father, George, is a busy and distant banker, while the mother, Winifred, is more interested in her activism than in raising her children, Jane and Michael. To make matters worse, the family is facing the crisis of finding a new nanny, as the last one left due to the children's demanding nature.
Fate smiles upon them when, out of nowhere, a magical nanny appears with unmatched charm. With her hat, umbrella, and contagious smile, she transforms the Banks' lives into a spectacular adventure. Not only does she take the children on days filled with magic and fun—like jumping in puddles and flying over rooftops—but she also teaches them important lessons about the joy of living and the significance of family.
Under the direction of the charismatic Bert, a lovable chimney sweep, the extraordinary nanny reveals the true value of imagination and kindness. As the Banks find a way to rediscover their lost connection with one another, they also confront the realities of life, dreams, and love. In a world where the impossible becomes possible, family love is strengthened, and magic becomes part of the everyday, leaving an unforgettable legacy that will endure forever.