Cha Hong-Do, a socially anxious woman, suffers from a severe case of blushing. She possesses a strong thirst for knowledge, often seeking solace in books and the internet. One day, her grandmother passes away, leaving her without a connection to the outside world. In an attempt to find work, Hong-Do disguises herself as an elderly woman and takes on the role of a housemaid. It is during this time that she unexpectedly encounters a psychiatrist named Ko Yi-Seok.