A wallet is stolen from high school teacher Kyeong-seok's class, and Se-ik, his student, is identified as the culprit. Kyeong-seok calls Se-ik and tells him to tell the truth because he will believe whatever he says. Se-ik finds it unfair, saying it's definitely not true. That night, Kyeong-seok's daughter, Yoon-hee, who was brought to school, got into a car accident. Once again, Se-ik is pointed out as the culprit - Everything faltered at the moment of doubt, between doubt and faith is a good man.