The setting is a small town in 1870s Pennsylvania. Sally Waterson and her father have stopped in town with their traveling medicine show, but when their wagon catches fire, they find themselves stranded. They're taken in by Mrs. Cortlandt and her grandson, Peter, who is trying to set up a pipeline that will supply oil throughout the state. Sally and Peter soon fall in love and marry. Neither their marriage nor Peter's pipe dreams flow too smoothly.