Preheat your oven to 425°F (220°C).
In a saucepan, combine raisins and water. Cook over medium heat until raisins are plump, about 5 minutes.
In a bowl, mix sugar, cornstarch, and cinnamon. Add to the raisin mixture and cook until thickened. Stir in lemon juice and butter. Let cool.
For the crust, mix flour and salt in a bowl. Cut in shortening until mixture resembles coarse crumbs. Add cold water, a tablespoon at a time, until dough forms.
Roll out half of the dough and line a 9-inch pie dish. Pour in the cooled raisin filling.
Roll out the remaining dough and place over the filling. Seal and flute the edges. Cut slits in the top crust to allow steam to escape.
Bake for 30-40 minutes, or until the crust is golden brown. Let cool before serving.