During colonial times, John and Anna settle in an Ohio village to become Moravian missionaries to the Lenape. When John is called away two days before Christmast to help at another settlement, he promises he'll be back by Christmas Day. When he doesn't show up, Anna works hard to not fear the worst while she provides her children with a traditional Moravian Christmas. Through it all, she discovers a Christmas promise that will give her the peace she craves.