This is the story of Kim Mi So, a secretary who has been serving her boss, Yoon Jung, for many years. Unexpectedly, there comes a moment when the girl wants to submit a resignation letter. Her boss is completely puzzled by what has come into her head. He has no intention of letting go of his loyal assistant. Since he cannot find an explanation for her actions, the boss comes to a simple conclusion: his subordinate is in love with him and can no longer be around him.