Thirteen-year-old Maddy Rollag finds it hard to adjust to life on her aunt and uncle's farm in Dakota Territory. Her schoolmates think she's spoiled, and Aunt Marta makes it clear that Maddy is not fit for farm life. Maddy desperately misses her father and life back home in St. Paul, Minnesota. But on January 12, 1888, everything changes. A blizzard traps Maddy and her classmates inside their schoolhouse. If they stay in the schoolhouse, they'll freeze,...