Kalamazoo?

Three young women (Mayim Bialik, Josie Davis, Joanna Clare Scott) return to their Michigan hometown to attend their 10th high-school reunion. Upon learning that a time capsule will be opened at the event, they plot to steal and destroy it before its embarrassing contents can be made public. The spirits of their dead grandmothers complicate matters even further by trying to help them carry out the scheme.