Transcript for Little girl in upstate New York has proof of Santa Claus' magic
Finally tonight, the little girl with the unusual question for Santa. Can you bring my mom a new heart? It's "America strong." If you have any doubts about Santa Claus, there's a little girl in upstate New York who has proof about the magic of Christmas. When Santa Claus asked what they wanted for Christmas, Sophie said she wanted a new heart for her mother. Before she said what she wanted. Reporter: It's hard for even her mom to tell the story. The little girl asking not for a toy, but for help. Mom needed a new heart. It was terrifying being in the hospital just waiting. Reporter: The 37-year-old mother of four was diagnosed with a rare heart condition. In dire shape around the holidays, she was airlifted to the university of Rochester medical center. She needed a life-saving heart transplant, but they told her she would have to wait. Some in the family started to lose hope. But not little Sophie. She told her grandmother not to worry. She goes, we'll get what we want for Christmas. Santa Claus will bring them to us. Reporter: And soon after the Christmas wish -- That's when the doctors came in and said that they by the grace of god they had a heart for her. Reporter: The surgery, a success. And here's the moment after spending weeks apart. The family finally reunited. Hi, guys. Reporter: And Sophie wasn't done asking Santa for gifts. And markers. Markers, too? Reporter: Christmas came early for this family, which can mean only one thing. Little Sophie is clearly on the nice list. Something like this really puts it into perspective. That it's not about presents, it's about being with your family, your loved ones. And we thank them for sharing that very special story.
This transcript has been automatically generated and may not be 100% accurate.