Two decades after his first magical ride, the Boy—now a grown man and a father—finds himself struggling with the demands of adulthood and the fading spark of Christmas spirit. His young son, curious but skeptical, begins to question the stories his father once believed in. On Christmas Eve, an unexpected sound echoes through the night: the familiar whistle of the Polar Express.
The train arrives once more, shimmering with snow and magic. Invited aboard with his son, the father embarks on a journey that mirrors his own childhood trip, but with new challenges and passengers from around the world. Along the way, they encounter a mysterious girl who’s lost her voice, a daring avalanche crossing, and the return of the enigmatic Hobo who hints at a deeper purpose to this year’s ride.
As they approach the North Pole, the magic feels different—fainter. Santa Claus reveals that belief around the world is weakening, and only true acts of wonder and selflessness can restore it. The father must confront his own doubts, while guiding his son to believe—not just in Santa, but in the spirit of giving, hope, and connection.
In a heartwarming finale, the son performs a simple act of kindness that rekindles the magic, saving Christmas for millions. Father and son return home forever changed, holding tight to a renewed belief that magic is real—for those who truly believe.