2 Corinthians 2 describes Paul encouraging the church in Corinth to forgive and restore a repentant member after church discipline. He explains that forgiveness helps prevent Satan from causing division through bitterness. Paul also talks about his concern for the church, his emotional struggles, and how he was comforted by news from Titus that the Corinthians were responding well to his earlier letter. The chapter emphasizes forgiveness, unity, and restoring relationships in the church.