Laura’s family’s first home in Minnesota is made of sod, but Pa builds a clean new house made of sawed lumber beside Plum Creek. The money for the materials will come from their first wheat crop. Then, just before the wheat is ready to harvest, a strange glittering cloud fills the sky, blocking out the sun. Soon millions of grasshoppers cover the field and everything on the farm. In a week’s time, there is no wheat crop left at all.