Christmas is coming, and Mary is excited that both of her children are bringing their families to Ivy Bay for the holiday. Grace Church is putting on its first ever living Nativity, and the congregation members are all pitching in, including Mary and Betty. But only a week before Christmas, the costumes go missing. Then the sheep escapes from its pen and the flyers around town have all been torn down. Someone is sabotaging the living Nativity! As Mary investigates the strange mishaps, she discovers that the truth is far more complicated than she expected. Can she save the Nativity - and the church's "goodwill toward men" - before Christmas?