(An Amish Starry Summer Night is a sequel to the An Amish Starry Christmas Night.) Rebecca Fisher's childhood best friend, Andrew Kauffman, left Clayton Falls without saying goodbye. It surprised Rebecca that fifteen-year-old Andrew never kept in touch with her after suddenly leaving their close-knit Plain community. Eleven years later, Andrew breaks his engagement with an English woman and quits college to join the Amish church.
When Rebecca takes a two week vacation from her job in Florida to visit her family, she's surprised that her old friend is living in his childhood home. Andrew wants to date Rebecca, but she's unsure about him. He and her family want Rebecca to quit her job to remain in their community.
Rebecca's afraid Andrew might change his mind about being Amish. After all, his widowed father left the Amish church to marry an English woman. During the time Andrew was away, he went to high school and college. Because Rebecca only completed the required eight years at the Amish school, she realizes education is another major difference between them.
Will Rebecca decide to quit her job and live again in Clayton Falls? Is falling in love with Andrew too big of a risk for Rebecca?