Someone missing is found on National Missing Children's Day (USA)

 

Oh boy, how to do this one without a spoiler…

 

Siblings Gerda and Kai are best friends until one day, the Snow Queen's mirror shatters into a million pieces. One shard pierces Kai's eye, the other his heart, and from that moment on, all he can see is evil and his heart is cold. Now taken in by the Queen, and cold to Gerda's affection, the girl tries all to get Kai, the old Kai, back.