Everything begins when Scott Calvin, a cynical and somewhat careless toy advertising executive, faces a quiet Christmas Eve without any major surprises. But everything changes when, after an unfortunate accident involving Santa Claus, Scott finds himself in an unusual situation: he must take on the role of the iconic character. Following the shocking revelation that the real Santa has disappeared, Scott, now forced to don the red suit, begins to transform his life. At first, he takes the matter lightly, but soon realizes that it's not just a simple job, but a tradition filled with magic.
With the help of his son Charlie, who is thrilled with the idea of his dad being Santa, Scott starts to experience the effects of Christmas “power.” His body takes on a more robust appearance and his personality changes; aligning with the festive spirit he had always laughed at. However, not everything is rosy. Scott’s ex-wife, now in a relationship with a psychiatrist, begins to suspect his strange transformations and reports him to the authorities.
As Christmas approaches, Scott must choose between resuming his normal life or accepting his new destiny, bringing together not just his family, but also the Christmas spirit that everyone seems to have forgotten. Can a man who started so skeptical become the symbol of Christmas hope? With laughter, heartwarming moments, and a touch of magic, this adventure becomes a timeless classic filled with lessons about family and faith.