Goosebumps: Beware, the Snowman

Jaclyn used to live in Chicago with her Aunt Greta, but they have moved to Sherpia, a small village on the edge of the Arctic Circle. Jaclyn goes looking for children her own age and meets an old man, who warns her about the monstrous snowman that lives at the top of the mountain. And then she notices a snowman with a red scarf in front of every house. What is going on?