Is Kris Kringle a criminal? Santa Clause's son is helping his father to find out who is Naughty or Nice. But the F.B.I. is investigating him to find out what is in a little book Kris is writing about the children of Congress. Is Kris Kringle a kidnaper? Children are missing. Is Kris Kringle involved? Is Kris Kringle a hero? Can the F.B.I. use Kris to help them find kidnaped children? Will the Naughty or Nice book let Kris tell them what is in the book? Can F.B.I. Agent Noel Nakashita use the book? Or will the book kill them for telling?