Here is the plot summary from Bethany House.
After a sheltered life in Pittsburgh, Hope Irvine is ready for a new adventure. When her father takes a position as a preacher in a railroad car converted into a traveling church, she's thrilled at the chance to accompany him. While accommodations in their new chapel car home are tight, Hope couldn't be happier putting her musical skills to good use and ministering to the people of West Virginia alongside her father. But when their chapel car arrives in Finch, West Virginia, they find a coal mining community that has hit hard times and is suspicious of outsiders.
Luke Hughes works for the coal mine when he can, but the struggling company doesn't always offer steady work. When Reverend Irvine and Hope arrive in town, Luke is intrigued by what the reverend can teach him--and by the lovely and kind Hope.
When Hope's desire to bring supplies and Sunday school classes to neighboring counties leads to her traveling with a flirtatious young mine manager, Luke is hard-pressed to suppress his jealousy. But when he begins to suspect the manager's motives are less than charitable, can he prove it without hurting Hope, or worse, putting her in danger?