This book has two stories in it: "Silent Night" and "All Through the Night".
In "Silent Night," Brian, a seven-year-old boy, is in New York City at Christmas with his mother and ten-year-old brother to visit his father, critically ill in the hospital. They plan to give him a St. Christopher medal, in the belief that it will make him well. When Brian sees a woman steal his mother's wallet, with the medal in it, he embarks on a dangerous journey that changes the life of his mother and that of the thief.
With "All Through the Night," two of Mary Higgins Clark's most endearing characters - Alvirah, the lottery winner turned amateur sleuth, and her husband, Willy - are caught up in a Christmas mystery that begins when a young mother leaves her newborn child on the doorstep of a church rectory on Manhattan's Upper West Side, and continues with the theft of a precious chalice from the church. It is a captivating tale of false identities and old wrongs made right, as well as a mystery that calls for all of Alvirah's deductive powers and Willy's world-class common sense.