Bo-na works part-time as a phone sex operator. She is the type of person who is reluctant to go out. She doesn't even bother when she listens to advice from people she doesn't know over the phone. She can't even be bothered to meet her boyfriend, Tommy. Most people have phone sex under the pretext of counseling, but Bo-na skillfully accepts it. It becomes a source of energy for various men. However, she is in a situation where she cannot even take a single step outside the house due to depression and panic disorder. Then one day, Bo-na was talking to a mysterious man who had come to counseling for the first time, and without realizing it, she became agitated because her conversation seemed comfortable and their situations seemed similar, but she is not ready to go out on her own yet as she is slowly falling into darkness. However, as time goes by, she gets to tell her own deep story to the man and gets the courage to go out.