Underground to Canada is a book about a girl named Julilly; who is a slave on a plantation. When Massa Hensen gets sick, and the plantation gets run down, Massa Hensen and Missy Hensen leave town. Now that there is no where for the slaves to stay, they have to be sold to slave traders. Julilly gets separated from Mammy Sally, and Mammy Sally tells Julilly, "There's a place the slaves been whisperin' about called Canada. The law don't alllow no slavery there. They say you follow the North Star, and when you step onto this land you are free." As Julilly rides off in the wagon with many other whimpering children she thinks about "Canada." One day, Mammy Sally and Julilly will meet again. But, first Julilly needs to escape to the land where there is no slavery. Canada.