Sommersby (1993)

In the reconstruction era after the Civil War, a man named John Sommersby returns to his wife and a small Tennessee community. However, as he settles back into his old life, doubts begin to arise about his true identity. His wife begins to suspect that he may be an imposter, and this suspicion leads to a court case where John must prove his true identity. As the trial progresses, secrets come to light and the truth about John's past is revealed.