Nah Ok-Bun is an elderly woman who is notorious for filing citizen's complaint at her district office and nicknamed "Goblin Granny". When Ok-Bun meets Park Min Jae, a young man who has recently been appointed as a junior civil service officer, she is dissatisfied with his attitude of not caring about her complaints and only trying to do the jobs that are assigned to him.
But there is an opportunity between these two as Ok-Bun wants to learn English. The senior class run by the local resident center does not fit her level, and the class at the English academy is too fast-paced and so she is eventually kicked out of the class. Ok-Bun sees Min Jae speaking English very fluently with a native speaker in the academy. Forgetting all the troubles she had with Min Jae, Ok-Bun asks Min Jae to teach her English. Min Jae refuses Ok-Bun's request because he does not want to take on the troublesome role. When Min Jae sees Ok-Bun taking care of his younger brother, Young Jae, he is moved by her warmth and agrees to become her English teacher. Min Jae teaches Ok-Bun and Ok-Bun's English improves.
Min Jae learns that Ok-Bun wishes to learn English to continue her friend Jeong-Shim's dream of testifying in front of the comfort women public hearing in Washington D.C. Ok-Bun and Jeong-Shim were both victims of the Japanese Military during World War II. Although Ok-Bun has prepared what to say in the public hearing, she can hardly speak as she is overwhelmed by the pressure she feels in the unfamiliar surroundings. When people start to question Ok-Bun's behavior, she hears and sees Min Jae in the audience which gives her the courage to testify against the atrocities of the Japanese Military.
