Sam Doonby, a mysterious and handsome drifter, steps off an interstate bus and quickly becomes the talk of a small Texas town. After finding work at Leroy's Country Blues bar, his musical talents make him a small-town star, attracting the attention of Laura, the beautiful but spoiled daughter of local doctor Cyrus Reaper.
Sam seems to always be in the right place at the right time to prevent disasters from happening in the town. Before long, jealousy and suspicion drive the townspeople to question his sudden arrival and motives. Finally, when Laura begins to doubt him as well, he disappears as quickly as he materialized.
Soon, everyone realizes that there was more to Sam Doonby than they understood, especially Cyrus and his family as the doctor's past comes back to haunt him.